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PT&P’s Smart Maintenance Solutions

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Online Course

Piping Design and Analysis Influence on Pipe Support Selection and Design

Surveying a piping system? Need to change a current system?

This course is also great for…

• New Engineers, Management and Operations
• Field, Process, Maintenance and New Engineers
• Piping and Piping System Designers and/or Instructors

*This online course is approved for 8 hrs. P.E. Credits

Live New Webinar

Sign-up for a Live Technical Webinar…

Pipe Clamp Design, Application & Installation Webinar

Date: Thursday, May 3, 2018

Register for either time slot: 10:00 am OR 2:00 pm CDT

Note: Time Zone is CDT * Central Daylight Time / GMT -5h

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This presentation will cover Pipe Clamps, including Hold-Down Clamps, Riser Clamps, Clevis Hangers, Yoke U-Bolt Clamps and Structural Supports. Learn how the appropriate type of pipe support is chosen based on the different design conditions. Find out how Finite Element Analysis is used in the design process and view the custom pipe supports designed for extreme applications.

 

 

After registering, you will receive a confirmation email containing information about joining the webinar.

Insulated Shoe Designs

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Fig. 4500 – HOT SHOE DESIGN
(MARINITE®️/CALCIUM SILICATE)

Fig. 4600 – COLD SHOE DESIGN
(POLYURETHANE)

Fig. 4700 – COLD SHOE DESIGN
(PERMALI®️/MICARTA®️)

Fig. 4800 – COLD SHOE DESIGN
(G10)

SIZE RANGE: For use with 1/2” through 72”, most designs. Insulation thicknesses of 1”, 1 1/2”, 2”, 2 1/2”, 3”, 3 1/2”, 4”, and larger sizes where specified.

HOW TO SIZE: Refer to “Insulation Chart”, on the next page for sizing the insulation material.

ORDERING:
Specify figure number, pipe size, insulation thickness, and insulating material.

Example:

PTP-4700-4-3-B
• 4700 = Type of insulated shoe (cold)
• 4 = Nominal pipe size
• 3 = Insulation thickness
• B = Insulating material (micarta®)

Engineered Spring Supports General Information

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Piping Technology & Products, Inc. is a manufacturer and fabricator of all types of pipe supports. This section is devoted to variable spring and constant supports. In addition to the many standard supports you will find described here, we will design and custom-build special supports to meet your specific needs. In fact, many of the items you will see in this catalog were developed for the specific requirements of a customer who could not use the standard designs available in our industry. If you do not find what you need, or if you need technical advice, please contact us.

Designers of piping systems must provide for the pull of gravity and for movement due to thermal expansion. Spring supports, variables, and constants are devices which are cost-effective and structurally sound in solving certain pipe support problems. Constants are more expensive, so they are usually used in more critical applications, described in detail in the Constant Spring Hangers section.

The illustration below shows three applications of spring supports and one involving a counterweight. In figure (A), a variable spring support is placed under the horizontal pipe just left of a vertical section which has a guide and rigid support. In (B) a variable hanger is suspended from above and connected to the elbow above the vertical section. In (C) the designer has chosen a constant load hanger because the vertical section is connected to a critical nozzle. A counterweight such as shown in (D) may be useful when pipe weights are unknown and must be balanced in the field. Piping Technology & Products, Inc. will calculate and custom-fabricate such counterweights for you.

Engineered spring supports configurations

Slide Bearing Plates – Selection Chart

Download Slide Plates General Information

Slide bearing plates are a very cost-effective way of providing for movement of mechanical systems. Piping Technology & Products, Inc. supplies slide bearing plates for a variety of applications including support of piping, heavy equipment such as pressure vessels, and structural steel members. The plates provide a surface with a low coefficient of friction which can be attached to a supporting structure. This combination provides support while simultaneously allowing an object to move (slide) freely along the supporting surface.

Most designers use the “sandwich” concept when applying slide plates to their systems. Diagram A (on Page 192) shows a “sandwich” composed of two identical slide plates, one on top and another on the bottom. Each slide plate is composed of two components: a metal backing plate (which is like the bun of the “sandwich”) and a low coefficient of friction material which is bonded to the metal backing plate.

Diagram A: Sandwich Concept Diagram A: Sandwich Concept

In a typical application, a slide bearing plate is welded to a structural steel member which is strong enough to provide the required support, but whose coefficient of friction is too high. When the pipe supported by the member moves (due to thermal expansion, for example) it slides across the surface of the bearing plate without contacting the steel beam. To return to our “sandwich” metaphor, the top half of the “sandwich” is bonded to the pipe, and the bottom half to the steel beam.

One combination of materials that we recommend is that of PTFE, 25% glass filled, bonded to stainless steel. Both materials resist oxidation and have long lives even in stressful environments. For large slide plates, galvanized steel can be used in place of stainless to reduce the cost.

Slide Plate Selection Chart
Temperature
Max Load
Coefficient of Friction
PTFE, 25% Glass Filled
-320°F to +500°F
Loads up to 2,000 PSI

.01 to .2

Bronzphite®
up to 1,100°F
Loads up to 5,000 PSI
.15
Graphite
+1,000°F Air & +3,000°F Inert
Loads up to 2,000 PSI
.15
Stainless Steel
up to 1500°F
Loads up to 5,000 PSI
0.08 @ Min. Pressure
0.06 @ Max. Pressure
(polished)
Marinite
+400°F to +800°F
100 PSI to 2,500 PSI
0.08 @ Min. Pressure
0.06 @ Max. Pressure

 

Assembly Basics
Slide plates are usually arranged in what is known as a ‘sandwich’ formation, which consists of an upper slide plate component and a lower slide plate component.

The lower slide plate may also be welded to a stationary support (i.e. structural steel member), which grounds the plate, while the other plate is attached to the moving component directly. As the system moves, friction is transferred at the intersection of the two plates.

When ordering, always specify the dimensions of the upper and lower slide plate. As a rule, the upper slide plate should be large enough to completely cover the lower plate at all times.

Recommended Applications / Temperature Limits
-320F to +500F with low PSI
Different plates are suited for different temperature limits. While all plates have been rigorously tested for suitability within industrial settings, understanding the particular variables of that setting is vital to purchasing the appropriate plate for each application.

TEMPERATURE CONSIDERATIONS
PTFE, 25% glass filled, provides a low coefficient of friction for most combinations of temperature and load. Diagram B, on Page 193, shows the recommended conditions for 3/32” PTFE, 25% glass filled. For most applications, PTFE, 25% glass filled, is adequate when the temperature is less than 400 °F. When the slide bearing plate must function at higher temperatures, graphite can be used instead of PTFE, 25% glass filled. The load-bearing capacity of graphite is not sensitive to increases in temperature, but the adhesive used to bond the graphite to its metal backing is. It is good practice to use additional mechanical fasteners such as counter-sunk screws to help hold the graphite in place when the temperatures are above 500 °F. For combinations of temperature and load beyond the capabilities of graphite, special designs must be considered.

ATTACHMENT CONSIDERATIONS
Welding is the most common method of attaching the slide bearing plate to supporting metal structures. When this approach is used a slide plate must be designed with a “lip” since the welding’s extreme temperature may break the bond between the low-friction material and the metal plate. A 1/4” “lip” is adequate for most welded installations. When welding cannot be used (for safety or other reasons) to attach the slide plates, bolting is the most common substitute.

Before we begin constructing your slide bearing plates, we need to know the following:
• The material you desire for the low-friction surface, based on the highest combinations of temperature and load the component will experience.
• The desired size and shape for the low-friction surface.
• The type of metal, size, and shape you desire for the backing steel. Most designers choose galvanized or stainless steel.

Slide bearing plates are components of many products Piping Technology & Products, Inc. supplies such as guided pipe shoes and upthrust constants. As a result, we have extensive experience in bonding PTFE, 25% glass filled, and graphite to metal plates. Modern adhesives are adequate for most applications. However, mechanical fasteners such as countersunk screws can be added when needed. If you have unique applications, we will be happy to custom design a practical solution for your application.

NON-STANDARD ASSEMBLY CONFIGURATIONS

 

Slide Plates for Higher Load Capacities

Notes:
1. Pressure range: 75 PSI to 2,200 PSI
2. Temperature range: -320 °F to 400 °F
3. Alternate backing materials are available.

 

Slide Plates for Deflection & Expansion at Higher Loads

Notes:
1. Pressure range: 75 PSI to 1,500 PSI
2. Temperature range: -50 °F to 200 °F
3. Alternate thicknesses of reinforced elastomer available.

 

Slide Plates For Welding To Mating Surfaces

Notes:
1. Pressure range: 75 PSI to 2,000 PSI
2. Temperature range: -320 °F to 400 °F
3. Alternate backing materials are available.

 

Slide Plates For High Temperature & High Load Bearing

Notes:
1. Pressure range: 100 PSI to 2,500 PSI
2. Temperature range 1/2” insulator: 400 °F to 800 °F
3. Coefficient of friction:
0.08 @ min. pressure
0.06 @ max. pressure

Support Assembly Components

Piping Technology & Products, Inc. maintains an extensive inventory of components required for pipe hanger and
support assemblies. Most of these are industry standards that have been used by piping designers for many
years. One of the value-added services we provide is assembly and tagging of units before shipping so field crews
can install them with minimal effort. Since we work with these materials daily, it is easier for us to do assemblies and
verify components and dimensions than it is for a field crew, for whom installing pipe supports is only one of many
tasks to be performed on a given workday.

Many assemblies are attached to the pipe with clamps. Our inventories include all types of clamps made from
carbon steel with galvanized and black finishes. We can fabricate clamps from alloy steels for high-temperature
applications in which standard clamps are not adequate. When ordering clamps, please add an “A” to the figure
number of any items to be fabricated from alloy material. We have included a chart to help with the specification of
special clamps for high-temperatures and heavy loads.

To compensate for pipe movement, a designer may choose from a variety of clevis hangers, roller hangers, and
adjustable bands to support the pipe. These are linked to the supporting structure with rods and other hardware
components. Beam attachments and other accessories are attached to the supporting structure to complete the
assembly. All of these components must be strong enough to support the loads in the environment where they are
installed. Galvanized components are often used to resist corrosion.

Saddle coverings are used with insulated pipes in order to provide protection to the insulation at points of support.
Roller stands, elbow supports, and other items can be supplied in adjustable models which allow field crews to make
easy installations.

Hold-downs are special clamping supports used on pipes that are subject to vibrations and stresses, such as those
near compressors. The hold-downs dampen these forces by transferring them to the supporting structure and thus
protect the piping system.

 

 

 

 

 

 

 

 

 

 

 

Pipe Saddles & 30″ Galvanized Riser Clamp

Nominal Insulation Table (Size vs. Actual)

NOMINAL INSULATION THICKNESS (in.)INSULATION O.D. (in.)APPROX. INSULATION THICKNESS (in.)

Pipe size: 1/2" (O.840 O.D.)

12 7/81
1 1/241 9/16
252 1/16
2 1/26 5/82 7/8
37 5/83 3/8
3 1/28 5/83 7/8
49 5/84 3/8

Pipe size: 3/4" (1.050 O.D.)

12 7/87/8
1 1/241 7/16
251 15/16
2 1/26 5/82 3/4
37 5/83 1/4
3 1/28 5/83 3/4
49 5/84 1/4

Pipe size: 1" (1.315 O.D.)

13 1/21 1/16
1 1/24 1/21 9/16
25 9/162 1/8
2 1/26 5/82 5/8
37 5/83 1/8
3 1/28 5/83 5/8
49 5/84 1/8

Pipe size: 1 1/4" (1.66 O.D.)

13 1/215/16
1 1/251 11/16
25 9/161 15/16
2 1/26 5/82 1/2
37 5/83
3 1/28 5/83 1/2
49 5/84

Pipe size: 1 1/2" (1.90 O.D.)

141 1/16
1 1/251 9/16
26 5/82 3/8
2 1/27 5/82 7/8
38 5/83 3/8
3 1/29 5/83 7/8
410 3/44 7/16

Pipe size: 2" (2 3/8" O.D.)

14 1/21 1/16
1 1/25 9/161 9/16
26 5/82 1/8
2 1/27 5/82 5/8
38 5/83 1/8
3 1/29 5/83 5/8
410 3/44 3/16

Pipe size: 2 1/2" (2 7/8" O.D.)

151 1/16
1 1/26 5/81 7/8
27 5/82 3/8
2 1/28 5/82 7/8
39 5/83 3/8
3 1/210 3/43 15/16
411 3/44 7/16

Pipe size: 3" (3 1/2" O.D.)

15 9/161
1 1/26 5/81 9/16
27 5/82 1/16
2 1/28 5/82 9/16
39 5/83 1/16
3 1/210 3/43 5/8
411 3/44 1/8

Pipe size: 3 1/2" (4" O.D.)

16 5/81 5/16
1 1/27 5/81 13/16
28 5/82 5/16
2 1/29 5/82 13/16
310 3/43 3/8
3 1/211 3/43 7/8
412 3/44 3/8

Pipe size: 4" (4 1/2" O.D.)

16 5/81 1/16
1 1/27 5/81 9/16
28 5/82 1/16
2 1/29 5/82 9/16
310 3/43 1/8
3 1/211 3/43 5/8
412 3/44 1/8

Pipe size: 4 1/2" (5" O.D.)

17 5/81 5/16
1 1/28 5/81 13/16
29 5/82 5/16
2 1/210 3/42 7/8
311 3/43 3/8
3 1/212 3/43 7/8
4144 1/2

Pipe size: 5" (5 9/16" O.D.)

17 5/81
1 1/28 5/81 1/2
29 5/82
2 1/210 3/42 9/16
311 3/43 1/16
3 1/212 3/43 9/16
4144 3/16

Pipe size: 6" (6 5/8" O.D.)

18 5/815/16
1 1/29 5/81 7/16
210 3/42
2 1/211 3/42 1/2
312 3/43
3 1/2143 5/8
4154 1/8

Pipe size: 7" (7 5/8" O.D.)

19 5/81
1 1/210 3/41 1/2
211 3/42
2 1/212 3/42 1/2
3143 1/8
3 1/2153 5/8
4164 1/8

Pipe size: 8" (8 5/8" O.D.)

110 3/41 1/16
1 1/211 3/41 1/2
212 3/42
2 1/2142 5/8
3153 1/8
3 1/2163 5/8
4174 1/8

Pipe size: 9" (9 5/8" O.D.)

111 3/41 1/16
1 1/212 3/41 1/2
2142
2 1/2152 5/8
3163 1/8
3 1/2173 5/8
4184 1/8

Pipe size: 10" (10 3/4" O.D.)

112 3/41
1 1/2141 9/16
2152 1/16
2 1/2162 9/16
3173 1/16
3 1/2183 9/16
4194 1/16

Pipe size: 11" (11 3/4" O.D.)

1141 1/8
1 1/2151 9/16
2162 1/16
2 1/2172 9/16
3183 1/16
3 1/2193 9/16
4204 1/16

Pipe size: 12" (12 3/4" O.D.)

1151 1/8
1 1/2161 9/16
2172 1/16
2 1/2182 9/16
3193 1/16
3 1/2203 9/16
4214 1/16

Pipe size: 14" (14" O.D.)

1162
1 1/2171 7/16
2181 15/16
2 1/2192 7/16
3202 15/16
3 1/2213 7/16
4223 15/16
Large sizes, insulation O.D. are in 1" increments.

Insulation thicknesses through 36" same as nominal.

All dimensions rounded to the nearest 1/16".

Instrument Supports – Welded and Adjustable Components

PT&P offers a complete line of adjustable instrument support components which, when combined, will create various configurations to your exact requirements or individual needs. We also provide welded instrument supports fabricated according to your specifications.

Welded instrument stand
Welded Instrument Support / Stand

Adjustable instrument stand
Adjustable Instrument Support / Stand

ADJUSTABLE INSTRUMENT SUPPORTS COMPONENTS

Primary support components are available in various mount styles, including floor mounts, wall mounts, u-bolt mounts, and cable mounts. These primary mounts can be used independently or together with secondary components to construct various packages for individual needs.

PTP-IS-600
PTP-IS-600
Primary component has a 2” pipe extension 54” long, designed for grade mounting of  instrument assemblies, comes with slotted hole in base.

PTP-IS-610
PTP-IS-610
Primary component has a 2” square extension
16” long, designed for mounting on vertical or
horizontal lines.

PTP-IS-620
PTP-IS-620
Primary component has a 2” pipe, at a right angle with a vertical leg, designed for mounting on vertical lines.

PTP-IS-630
PTP-IS-630
Primary component has a 2” pipe, at a right angle with a vertical leg, designed for mounting on horizontal lines.

PTP-IS-640
PTP-IS-640
Female adaptor with two 2” extension 2” long, provides female connection to 2” pipe components, used for constructing multiple instrument support systems.

PTP-IS-650
PTP-IS-650
Adaptor with 2” pipe extension 8” long.

PTP-IS-660
PTP-IS-660
2” square extension component, 16” long, with 2” u-bolt mount, for constructing various instrument support configurations.

PTP-IS-670
PTP-IS-670
2” square component, 24” long designed for use in constructing multiple support mounts and other applicable configurations as required.

PTP-IS-680
PTP-IS-680
Secondary component, with 2” u-bolt mount,
provides auxiliary equipment mount and/or flag for identification.

PTP-IS-690
PTP-IS-690
Primary component, 2” square extension 16” long, designed for mounting on walls and columns.

Note: The extension lengths shown on primary components are standard, other lengths can be furnished on request.

WELDED INSTRUMENT SUPPORTS

Welded instrument supports may be fabricated in any desired configuration according to the customer’s individual requirements and design specifications.

Examples of various welded instrument support configurations:

Welded Instrument Support Configuration
Welded Instrument Support Configuration (Diagram A)

Welded Instrument Support Configuration
Welded Instrument Support Configuration (Diagram B)

Welded Instrument Support Configuration
Welded Instrument Support Configuration (Diagram 2A)

Welded Instrument Support Configuration
Welded Instrument Support Configuration (Diagram 2B)

Instrument Supports Selection Chart

Cable Mounts
U-Bolt Mounts
Wall Mounts
Floor Mounts
Secondary Supports
Attachment:
Attached to instrument by cable.
Attached to piping instrumentation.
Welded or bolted to support.
Welded or bolted to support.
Attached to instrument; welded or clamped on stand.
Function:
Support and hold instrument at fixed location.
Hold instrument during plant operation.
Support instrumentation during operations.
Support instrumentation during operations.
Used in combination with primary supports to support instrumentation.
Location:
Where instrument is welded to structure
Bolted into concrete or welded to structure.
Bolted to walls and other vertical surfaces.
Bolted on the floor or in the ground.
Attached to primary instrument stands, usually floor or wall mounts.

Marinite® Technical Information

Marinite can be used as the insulating material in hot piping supports. The most widely known grade for Marinite is grade P. Marinite-P is most often used as structural insulation because of its high dimensional stability. Marinite-P is incombustible, provides high insulation values, and high compressive strengths and is thus appropriate in high-load and high-temperature applications. The material minimizes decay, rust, and corrosion and it resists damage during installation and provides durable service. The material acts as a suitable insulator in fireproofing and heat processing equipment applications up to 1200°F (649°C).

Major Advantages:
• High Compressive Strength.
Deflects less than 1/10 in. per inch of thickness under 4000 psi
Deflects less than 3/64 in. per inch of thickness under 2000 psi
• High Tensile strength.
• High resistance to shear and traverse forces.

Major Applications:
• Hot Line Pipe Supports in Power Generation and Process Industries
• Structural Insulation in Pipe
• Supports Backup Insulation in Rotary Kilns of Lime and Cement Plants.
• Ceramics and Foundry applications.

Coefficient of Friction:
0.08 @ minimum pressure
0.06 @ maximum pressure

Firetemp® Technical Information

Firetemp®, usually known as Super Firetemp®, is widely used as insulation for hot piping supports. It is an inorganic incombustible material. Chemically, it features a xonotlite crystal structure that results in exceptional strength and extremely low water if hydration. Super Firetemp®  is composed primarily of lime, silica, and reinforcing fibers. The product is white, essentially dust-free, and contains no asbestos. It is a very good material for structural insulation inserts.

Firetemp®  insulation’s major advantages and applications are given below. For more detail please see the Insulation Comparison Table.

Major Advantages:
• Exceptionally High Strength
• Low Conductivity
• Easy Application
• Zero clearance to combustibles
• Temperature Range to 1800°F
• Asbestos-Free

Major Applications:
• Hot Line Pipe Supports in Power Generation and Process Industries
• Indoor and Outdoor Piping and Equipment
• Block Insulation
• Fire rated enclosures around kitchen exhaust hood
• Fireproofing structural steel
• Fire rated walls

Foamglas® Technical Information

Foamglas® insulation is a lightweight, rigid insulation composed of millions of completely sealed glass cells. Each cell serves as an insulating agent. Foamglas® is widely used in the cryogenic and hotline pipe supports and is fabricated in various ranges of shapes, thicknesses, and sizes to meet the particular requirements of an application.

One unique advantage that Foamglas® has is its very low moisture absorption. Since Foamglas® insulation is full of closed glass cells, it resists moisture in both liquid and vapor form. This guarantees the long-term performance of the insulation. Foamglas® insulation’s resistance to moisture ensures that properly installed, it retains its original thermal efficiency.

The major advantages and applications of Foamglas® insulation are listed below. For details about the physical and mechanical properties of the Foamglas® material, please refer to the table.

Major Advantages:
•Constant Insulating Efficiency
•Fire Protection
•Corrosion Resistance
•Long-Term Dimensional Stability
•Physical Strength

Major Applications:
•Cryogenic and Hot Line Pipe Supports
•Cryogenic Tanks and Vessels
•Chilled and Hot Water Service Lines
•Overfit and Revitalize the Old Insulation
•Composite Insulation Systems for Special Conditions

  Density   Foam Glass(8 pcf)
  Compressive Strength   400.00
  Flexural Strength (flat wise with grain) (psi)   80.00
  Tensile Strength (with grain)(psi)   N/A
  Modules of Elasticity (psi)   1.3 10^6
  Closed Cell Content (%)   N/A
  Temperature (F)-Continuous Operation   500 max.
  K-Factor   N/A
  Thermal Conductivity (btu/hr m^2 of)   0.7000
  Shear (flat wise) (1/8″ thk.) (psi)   N/A
  Density (lb/in^3)   0.0046
  Water Absorption (%)   0.070

Calcium Silicate Technical Information

Calcium Silicate often serves as the insulation for pipe supports in high-temperature applications. Calcium Silicate is also known as Thermo-12/Blue. It is an insulating material composed of hydrous calcium silicate which, because of its lightweight, low thermal conductivity and exceptional structural strength are ideal for the insulation of high-temperature piping and equipment. Sometimes it is also used as block insulation. The pipe insulation comes in a complete selection of sizes. Block styles are available for application to various flat and curved surface areas.

Some of Calcium Silicate’s major advantages and applications are given below:

Major Advantages:
• Temperature Range to 1200°F
• Exceptional Strength
 Low Thermal Conductivity
 Easy Application: available sizes and shapes reduce the number of required joints and make Calcium Silicate easy to work with.
• Energy Savings: low thermal conductivity provides significant energy savings.
 Adaptable: Calcium Silicate can also be used on various shapes and sizes of surfaces.
 Fire Resistant.
 Low Chloride Content: low corrosivity.
• Asbestos-Free.

Major Applications:
 Hot Line Pipe Supports in Power Generation and Process Industries.
• Indoor and Outdoor Piping and Equipment.
 Block Insulation – insulation of various flat and curved surface areas.

Polyurethane Foam (PUF) Technical Information

Polyurethane foam is one of the major components of pre-insulated pipe supports manufactured at Piping Technology & Products. Polyurethane is different from most plastic materials in that it can be tailored to meet various load requirements of varying applications. Polyurethane foams are produced by reacting an equal ratio of di- or polyisocyanurates with polyols, in the presence of water, which acts as the blowing agent. Polyisocyanurates are formed when a higher ratio of di- or polyisocyanate are mixed with the polyol. All rigid foams made from polyisocyanurate systems have some form of polyurethane in them and can be called polyurethane foam. The physical properties differ very little at high densities. Polyisocyanurate foams are used in applications where dimensional stability over 200 deg F is required. However, for cryogenic applications, where your pipeline insulation is not exposed to high temperatures, PUF is an acceptable substitution.

A common method used to obtain a change in load capacity is a change in density. At Piping Technology and Products, we offer 10 lbs. / ft3, 14 lbs. / ft3, and 20 lbs. / ft3 densities.

Density varies when the amount of blowing agent (water content) changes. The density of polyurethane decreases with increase in water content (See Fig. 1). This relationship can be shown as follows:

W = 3.706 / D1.126

Where: W = % of water content
D = Density of foam (lbs./ft3.)

In addition to density, the strength of a rigid urethane foam is also influenced by many factors such as catalyst, surfactant, type of mixing, the type of foaming system: base polyol and isocyanate, and the influence of each of these on the foam cell structure.
Rigid urethane foams generally have an elastic region in which stress is nearly proportional to strain. They do not exactly follow Hooke’s Law (stress is proportional to strain) because the curve is very slightly “S” shaped. Fig. 2 shows this in detail.

Polyurethane is anisotropic, or polyurethane is stronger in the direction of foam rise. At Piping Technology and Products, the anisotropic character or directional properties of our polyurethane is reduced by overloading the mold used to form the polyurethane. By overloading the mold, we can control the cell structure and provide uniform physical properties. A relationship between compressive strength and the density of the foam is given in Fig. 3.

Polyurethane is a thermosetting material; however, it does soften slightly with increased temperature and hardens somewhat at very low temperatures. Softening at high temperatures affects the polyurethane in two ways: (a) loss of strength properties and (b) change in foam dimensions (particularly low-density foams). Low temperatures generally have a very little effect on polyurethane properties other than to make them a little harder and more brittle. See Fig. 4 for these effects.

Rigid polyurethane foams have a relatively large amount of cross-linking as the foam expands. Our suppliers of the raw chemicals control the degree of cross-linking by functionality (higher functionality produces more cross-links) and molecular weight of the components in the blend. The rigid cells provide the poured foam with strength and the interior space provides low thermal conductivity. Water is used as the blowing agent for foam in this 10 to 40 lb. density range.

The relationship between temperature, thermal conductivity and the density of polyurethane foam is shown in Fig. 5.

The relationships of foam’s density with its Elastic Modules in Compression, Tensile Strength, Elastic Modules in Tension, and Shear Strength are given in Figs. 6 through 9 respectively. Please see the following for the respective curves.

Piping Technology & Products has a complete manufacturing facility for production of polyurethane required for pipe supports. We invite our customers to visit our facility and observe the fabrication of insulated pipe supports of all types.

DENSITY
COMPRESSIVE STRENGTH
FLEXURAL STRENGTH (flatwise with gran) (psi)
TENSILE STRENGTH (with grain) (psi)
MODULUS OF ELASTICITY (psi)
CLOSED CELL CONTENT (%)
TEMPERATURE (F) CONTINUOUS OPERATION
K-FACTOR
THERMAL CONDUCTIVITY (btu/hr m^2 of)
SHEAR (flatwise 1/8″ thk. Psi)
DENSITY (lb/in^3)
WATER ABSORPTION (%)
PUF (10lb/cuft) 200.00 400.00 300.00 6,000.00 95.00 -300.00 0.08 0.1600 180.00 0.1157 0.22
PUF (14lb/cuft) 300.00 600.00 500.00 11,000.00 95.00 -300.00 0.12 0.2000 200.00 0.1736 0.18
PUF (20lb/cuft) 500.00 1,100.00 600.00 20,000.00 95.00 -300.00 0.14 0.2500 400.00 0.2893 0.13

Laminated Beechwood Technical Information

Laminated Beechwood Technical Information Permali® or Insulam® is an insulating material used in applications which require high tensile and compressive strength (see table below). In addition, due to its exceptional resistance to moisture, it serves as a suitable insulator where the support (flare lines & dummy legs) is exposed to harsh environmental elements. Permali® or Insulam® is a phenolic laminated (densified, impregnated wood) product made from carefully selected thin beechwood veneers. These wood layers are impregnated under vacuum conditions with a special synthetic resin and then densified through the application of heat and pressure. The result is a homogenous material that combines the great strength and toughness of wood fibers with the excellent stability and dielectric properties of the most advanced thermosetting. The phenolic laminated block material is furnished with cross-directional fibers as shown in Figure 10 below.

NOTE: Cross-laminated.
For components in compression or for parts stressed in more than one direction.
Sizes to suit most applications.

 

Density Permali
  Compressive Strength   30,000.00
  Flectual Strength (flatwise with grain) (psi)   15,000.00
  Tensile Strength (with grain) (psi)   15,000.00
  Modulus of Elasticity (psi)   2.0 x 10^6
  Closed Cell Content (%)   N/A
  Temperature(F)-Continuous Operation   221.00
  K-Factor   N/A
  Thermal Conductivity (btu/hr m^2 of)   0.0018
  Shear (flatwise) (1/8″ thick) (psi)   7200.00
  Density (lb/in^3)   0.0469
  Water Absorption (%)   0.75

Insulation Layering

At Piping Technology and Products, we recommend multiple layers for cold shoe supports that have a total insulation thickness of four inches or greater.

In the field, cold shoes are typically mated with existing line insulation. Due to the low temperature of the pipe, moisture from the ambient air can be drawn to the pipe through gaps that may exist between the cold shoe and the line insulation. At lower temperatures, where thicker insulation is required, there is greater opportunity for moisture to be drawn to the pipe. This is because of the increased single mating surface area between the line insulation and the cold shoe.

A solution that eliminates this potential problem is providing multiple mating surfaces between the line insulation and the pipe support. Hence: When insulation thickness is four inches and greater, multiple layers provide an improved moisture seal due to steps between the different layers.

To determine the thickness of each layer, refer to our suggested layering chart on the following page. To use this table, reference the total insulation thickness to determine how many layers are suggested and how thick each layer should be.

Example: A four inch (4″) pipe that requires five inches of insulation: Referring to PT&P’s suggested layering chart, two layers are required. The first layer (inner layer) thickness is suggested to be 2″ and the second layer (the outer layer) is suggested to be 2″ thick.

Piping Technology and Products can tailor a layering system to meet the customer’s requirements. The included layering chart is only a guideline.

NOMINAL
Insulation Thickness
Layer 1
Layer 2
Layer 3
1″
1″
1.5″
1.5″
2″
2″
2.5″
2.5″
3″
3″
3.5″
3.5″
4″
2″
2″
4.5″
2″
2.5″
5″
2.5″
2.5″
5.5″
2.5″
3″
6″
2.5″
3.5″
6.5″
2.5″
2″
2″
7″
2.5″
2.5″
2″
8″
3″
2.5″
2.5″

Client Testimonials

“Piping Technology worked countless hours of overtime, weekends, etc. to support the piping reinforcement exercise and delivered the overwhelming majority of those items on or before the required dates. In addition, Piping Technology was instrumental in designing and fabricating the hinge system used to access vessels which created a safer environment in the field.”

–Procurement Manager (LNG Project)

 

“I would like to express my personal appreciation for the extraordinary efforts put forth by the individuals at U.S. Bellows. When our G417 Pump piping failed suddenly during the plant startup, everything went from a normal startup to emergency status, the response by the people at your facility was immediate and highly effective.  With one of our major process plants shutdown and waiting on this bellows for startup, the need and pressure to expedite the completion of this bellows was immense. The individuals at U.S. Bellows demonstrated the willingness to go the extra mile and complete the construction ahead of the original projected timeline. These actions were instrumental in helping to solve the many logistical and technical problems associated with the cleanup and startup in a timely manner.”

–Buyer (Large Refinery Project)

 

“Each and every support was fabricated well ahead of schedule and arrived at site before the pipe did. This eliminated the need for using temporary supports. All supports reached site with out any missing parts as all supports were pre-assembled and pre inspected by our joint inspection team and PTP QC department. PT&P was pro-active in supporting the site engineers in terms of modification of supports and replacing springs that were required due to field re-routes and changes. Our construction partner and we are equally satisfied with PT&P pipe supports and concluded that these two projects were one of the best projects they have built in the recent years.

–Pipe Stress Analysis (Combined Cycle Plant Project)

 

“Thank you very much for the excellent work you and your associates at PTP/USB provided on my bellows order. Although we agreed to a 10-day rush delivery, your shop responded to my project schedule and delivered 14 bellows assemblies in only 7 days from my order. This quick delivery helped us avert a scheduling conflict on a very critical project. I would be glad to recommend U.S. Bellows to anyone in need of a quality product with on-time or better delivery.”

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Pipe Shields to Rilco

Pipe Shields, Inc. Figure Numbers to Rilco Figure Numbers Equivalency Chart
The information provided in our equivalency section is a general guide only and should not be treated as a substitute for detailed technical advice in relation to individual circumstances or particular applications of pipe support products. Please contact Pipe Shields, Inc. if you require such advice. PTP/PSI is not responsible for customer selection and/or use of competitor products based on equivalency chart.
Pipe Shields Figure No.Rilco Figure No.
Pipe Shields A1000Rilco HC-1000, Rilco HF-1000
Pipe Shields A2000Rilco HC-2000, Rilco HF-2000
Pipe Shields A3000Rilco HC-3000, Rilco HF-3000, Rilco HR-3000
Pipe Shields A4000Rilco HC-4000, Rilco HF-4000, Rilco HR-4000
Pipe Shields A5000Rilco HF-5000, Rilco HR-5000,
Pipe Shields A6000Rilco HF-6000, Rilco HR-6000
Pipe Shields A7000Rilco HF-7000
Pipe Shields A7200Rilco HF-7200
Pipe Shields A7400Rilco HF-7400
Pipe Shields A8000Rilco HF-8000
Pipe Shields A8200Rilco HF-8200
Pipe Shields A8400Rilco HF-8400
Pipe Shields A9000Rilco HC-9000
Pipe Shields B1000Rilco HS-1000
Pipe Shields B1100Rilco HS-1100
Pipe Shields B1200Rilco HS-1200
Pipe Shields B1300Rilco HS-1300
Pipe Shields B2000Rilco HS-2000
Pipe Shields B2100Rilco HS-2100
Pipe Shields B2200Rilco HS-2200
Pipe Shields B2300Rilco HS-2300
Pipe Shields B3000Rilco HG-3000
Pipe Shields B3100Rilco HG-3100
Pipe Shields B3200Rilco HG-3200
Pipe Shields B3300Rilco HG-3300
Pipe Shields B4000Rilco HG-4000
Pipe Shields B4100Rilco HG-4100
Pipe Shields B4200Rilco HG-4200
Pipe Shields B4300Rilco HG-4300
Pipe Shields B5000Rilco HS-5000
Pipe Shields B5100Rilco HS-5100
Pipe Shields B5200Rilco HS-5200
Pipe Shields B5300Rilco HS-5300
Pipe Shields B6000Rilco HS-6000
Pipe Shields B6100Rilco HS-6100
Pipe Shields B6200Rilco HS-6200
Pipe Shields B6300Rilco HS-6300
Pipe Shields B7000Rilco HG-7000
Pipe Shields B7100Rilco HG-7100
Pipe Shields B7200Rilco HG-7200
Pipe Shields B7300Rilco HG-7300
Pipe Shields B8000Rilco HG-8000
Pipe Shields B8100Rilco HG-8100
Pipe Shields B8200Rilco HG-8200
Pipe Shields B8300Rilco HG-8300
Pipe Shields C1000Rilco HA-1000
Pipe Shields C1100Rilco HA-1100
Pipe Shields C2000Rilco HA-2000
Pipe Shields C2100Rilco HA-2100
Pipe Shields C3000N/A
Pipe Shields C3100N/A
Pipe Shields C3200N/A
Pipe Shields C3300N/A
Pipe Shields C4000Rilco HA-4000
Pipe Shields C4100Rilco HA-4100
Pipe Shields C4200Rilco HA-4200
Pipe Shields C4300Rilco HA-4300
Pipe Shields D1000Rilco HH-1000
Pipe Shields D2000Rilco HH-2000
Pipe Shields D3000Rilco HH-3000
Pipe Shields D3100Rilco HH-3100
Pipe Shields D3200Rilco HH-3200
Pipe Shields D3300Rilco HH-3300
Pipe Shields D4000Rilco HH-4000
Pipe Shields D5000Rilco HH-5000
Pipe Shields D6000Rilco HH-6000
Pipe Shields D6100Rilco HH-6100
Pipe Shields D6200Rilco HH-6200
Pipe Shields D6300Rilco HH-6300
Pipe Shields E1000Rilco HV-1000
Pipe Shields E1100Rilco HV-1100
Pipe Shields E1200Rilco HV-1200
Pipe Shields E1300Rilco HV-1300
Pipe Shields E2000Rilco HV-2000
Pipe Shields E2100Rilco HV-2100
Pipe Shields E2200Rilco HV-2200
Pipe Shields E2300Rilco HV-2300
Pipe Shields G1000N/A
Pipe Shields G1200N/A
Pipe Shields G2000N/A
Pipe Shields G2200N/A
Pipe Shields G3000N/A
Rilco Figure Numbers to Pipe Shields Figure Number Equivalent
RilcoPipe Shields Figure
Rilco HC-1000Pipe Shields A1000
Rilco HC-2000Pipe Shields A2000
Rilco HC-3000Pipe Shields A3000
Rilco HC-4000Pipe Shields A4000
Rilco HC-9000Pipe Shields A9000
Rilco HF-1000Pipe Shields A1000
Rilco HF-2000Pipe Shields A2000
Rilco HF-3000Pipe Shields A3000
Rilco HF-4000Pipe Shields A4000
Rilco HF-5000Pipe Shields A5000
Rilco HF-6000Pipe Shields A6000
Rilco HF-7000Pipe Shields A7000
Rilco HF-7200Pipe Shields A7200
Rilco HF-7400Pipe Shields A7400
Rilco HF-8000Pipe Shields A8000
Rilco HF-8200Pipe Shields A8200
Rilco HF-8400Pipe Shields A8400
Rilco HR-3000Pipe Shields A3000
Rilco HR-4000Pipe Shields A4000
Rilco HR-5000Pipe Shields A5000
Rilco HR-6000Pipe Shields A6000
Rilco HS-1000Pipe Shields B1000
Rilco HS-1100Pipe Shields B1100
Rilco HS-1200Pipe Shields B1200
Rilco HS-1300Pipe Shields B1300
Rilco HS-2000Pipe Shields B2000
Rilco HS-2100Pipe Shields B2100
Rilco HS-2200Pipe Shields B2200
Rilco HS-2300Pipe Shields B2300
Rilco HS-5000Pipe Shields B5000
Rilco HS-5100Pipe Shields B5100
Rilco HS-5200Pipe Shields B5200
Rilco HS-5300Pipe Shields B5300
Rilco HS-6000Pipe Shields B6000
Rilco HS-6100Pipe Shields B6100
Rilco HS-6200Pipe Shields B6200
Rilco HS-6300Pipe Shields B6300
Rilco HG-3000Pipe Shields B3000
Rilco HG-3100Pipe Shields B3100
Rilco HG-3200Pipe Shields B3200
Rilco HG-3300Pipe Shields B3300
Rilco HG-4000Pipe Shields B4000
Rilco HG-4100Pipe Shields B4100
Rilco HG-4200Pipe Shields B4200
Rilco HG-4300Pipe Shields B4300
Rilco HG-7000Pipe Shields B7000
Rilco HG-7100Pipe Shields B7100
Rilco HG-7200Pipe Shields B7200
Rilco HG-7300Pipe Shields B7300
Rilco HG-8000Pipe Shields B8000
Rilco HG-8100Pipe Shields B8100
Rilco HG-8200Pipe Shields B8200
Rilco HG-8300Pipe Shields B8300
Rilco HA-1000Pipe Shields C1000
Rilco HA-1100Pipe Shields C1100
Rilco HA-2000Pipe Shields C2000
Rilco HA-2100Pipe Shields C2100
Rilco HA-4000Pipe Shields C4000
Rilco HA-4100Pipe Shields C4100
Rilco HA-4200Pipe Shields C4200
Rilco HA-4300Pipe Shields C4300
Rilco HH-1000Pipe Shields D1000
Rilco HH-2000Pipe Shields D2000
Rilco HH-3000Pipe Shields D3000
Rilco HH-3100Pipe Shields D3100
Rilco HH-3200Pipe Shields D3200
Rilco HH-3300Pipe Shields D3300
Rilco HH-4000Pipe Shields D4000
Rilco HH-5000Pipe Shields D5000
Rilco HH-6000Pipe Shields D6000
Rilco HH-6100Pipe Shields D6100
Rilco HH-6200Pipe Shields D6200
Rilco HH-6300Pipe Shields D6300
Rilco HV-1000Pipe Shields E1000
Rilco HV-1100Pipe Shields E1100
Rilco HV-1200Pipe Shields E1200
Rilco HV-1300Pipe Shields E1300
Rilco HV-2000Pipe Shields E2000
Rilco HV-2100Pipe Shields E2100
Rilco HV-2200Pipe Shields E2200
Rilco HV-2300Pipe Shields E2300
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