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PTFE, 25% Glass Filled, Cut and Bonded to a Polyslinger

April 12th, 2002 No comments

 

PTFE, 25% Glass Filled, Cut and Bonded to a Polyslinger

PTFE, 25% Glass Filled, Cut and Bonded to a Polyslinger

Piping Technology & Products, Inc. cut and bonded a PTFE, 25% glass filled, ring (see fig.1) to a polyslinger which will be utilized at a Chemical plant in Texas.

The polyslinger was a total weight of 33 lbs and its lip measured at 26″ O.D. The PT&P worker cut the PTFE, 25% glass filled, at 24″ I.D. with a thickness of 3/32″ and then bonded it to the lip of the polyslinger with an epoxy resin adhesive. PTFE, 25% glass filled, is used as padding, intended for reducing metal-to-metal friction.

Are polyslingers a necessity for you? Get pricing on one today!

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Categories: Slide Plates Tags:

24", Chrome-Moly, Three-Bolt Clamps with Stanchions

April 5th, 2002 No comments
24", Chrome-Moly, Three-Bolt Clamps with Stanchions

24", Chrome-Moly, Three-Bolt Clamps with Stanchions

Piping Technology & Products, Inc. designed and fabricated 24″, chrome-moly, three-bolt clamps with horizontal guide stanchions for a 765 MW natural gas-fired combined cycle facility in Mexico.

These clamps, in conjunction with variable springs, will allow for vertical and axial pipe movement while restricting lateral movements. They were made for 24″ OD pipe from 1-1/2 x 9″ stock material. Based upon design considerations, the clamp “E” dimension, from pipe centerline to outer load bolt, was 25″. The clamps were designed for operation at 1065°F and per customer-supplied information, the vertical design load was 1,848 lbs and the maximum lateral load was 19,207 lbs.

The clamp plates are made of A387 GR. 22 plate material, stanchion pieces of A335 GR.22 pipe and the side stop plates of carbon steel.

Want more information on three-bolt clamps? Learn more about them in our webinar archives!




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Pipe Shoes with Loads up to 75,000 lb.

March 29th, 2002 No comments
Pipe Shoes with Loads up to 75,000 lb.

Pipe Shoes with Loads up to 75,000 lb.

Piping Technology & Products, Inc. designed and fabricated several pipe shoes with loads up to 75,000 lbs. respectively, for a 750MW power plant in Alabama.

The shoes are to support the cooling towers’ circulatory water system at the power plant. The majority of the shoes were designed for a 60″ line and 50,000 lb. load, and the remaining few were designed for a 78″ line and 75,000 lbs. of load. After extensive engineering hours and structure analysis, PT&P’s engineering department was able to produce a detailed design and 3-D model for the supports that would allow them to run electronic interface checks.

Do you need pipe shoes? Get pricing today!

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Constant Spring Hangers with Loads up to 105,000 Lbs.

March 15th, 2002 No comments
Constant Spring Hangers with Loads up to 105,000 Lbs.

Constant Spring Hangers with Loads up to 105,000 Lbs.

Piping Technology & Products, Inc., custom designed and fabricated a collection of constants for an oil refinery in New Jersey. This application required the use of suspended constants, 100-C and base constants, 200-F.

 

Constant Spring Hangers with Loads up to 105,000 Lbs.

Constant Spring Hangers with Loads up to 105,000 Lbs.

In order to support the lines at the oil refinery, PT&P designed the 100-C constant spring hangers (vertical constants suspended from beams) at two different loads and total travels. The 100-C constant with a load of 105,000-lbs. and total travel of 6″ (figure 1) is set to travel 1-3/4″ down and 1-15/16″ up. It is 38-3/8″ in width, 79-1/4″ in height and furnished with a double lug suspension to allow it to hang from a double point suspension beam.

In comparison to the aforementioned constant, this particular 100-C constant spring hanger (figure 2) has a load of 33,000 lbs. and a total travel of 4-1/2″, 3/8″ up and 1-1/2″ down. This specific constant is 24-1/4″ in width, 71″ in height and also furnished with a double lug suspension to suspend from a double point suspension beam. Although the dimensions of these two constants are similar, the size of the springs and cams are very different.

Opposed to the 100-C constant, the 200-F constant spring hanger is a horizontal constant used to support piping from below. These 200-F constant spring hangers were designed with loads of 40,750 lbs. and total travels of 4-1/2″, 3/8″ up and 1-3/4″ down. These constants will be used in conjunction with sway struts to support pipelines at the oil refinery.

Learn more about constants spring hangers by visiting our website archives!



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March 2002 News

March 4th, 2002 No comments

PT&P Utilizes 3D-Modeling Technology to Design Pipe Supports for a 750MW Power Plant

3D-Design Clamp

3D-Design

Pipe Clamps

Pipe Supports on Shipping Floor

Piping Technology & Products, Inc. recently designed and fabricated 9 pipe supports with loads up to 75,000 lbs. for a 750MW power plant in Alabama. After extensive engineering hours and structure analysis, PT&P’s engineering department produced a detailed design and 3-D model for the supports that would allow them to run electronic interface checks. The supports are to support the cooling towers’ circulatory water system at the power plant. Six of the 9 supports were designed for a 60” line and 50,000 lb. load, and the remaining 3 were designed for a 78” line and 75,000 lbs. of load.

Furnace Springs Versus Standard Springs The major differences between standard springs and furnace springs are their construction and intended use. Furnace springs operate in much the same way as other variable spring supports. They are designed to support the pipe and tubes that are subject to vertical thermal movement. The design changes come about because, furnace springs are exposed to extreme temperatures.

FURNACE SPRINGS STANDARD SPRINGS
COATINGS Red oxide primer in order to aviod potential hazards when exposed to high temperatures Hot dipped galvanized which tends to melt the zinc coating. Molten zinc can damage surrounding pipe and equipment.
CONSTRUCTION
Unique to its application and intended use
Welded design for housing assembly
Centers the spring coils within the housing and accommodates lug attachments
Interchangeable
Bolted configuration for the housing
DESIGN Spring used as a means to determine the loading of the catalyst tubes

January 2002 News

January 2nd, 2002 No comments

How to Size a Spring Hanger

Piping systems are used to transport gases, liquids and suspended solids between units of a plant. The temperatures of the contents and the pipe when the plant is in operation are often quite different from the ambient temperature of the surroundings. The heat transferred during changes in temperature causes metal pipe to expand and contract. Piping designers must provide for movement due to temperature changes and forces caused by pumps, gravity and other elements of the piping system.Read PT&P’s “How to Size a Spring Hanger” Technical Bulletin for more information.

PT&P Specially Designs and Fabricates Constants for a Radiant-Tube Support System
Constant Springs

These constants are an essential component of the radiant-tube support system for a reforming furnace. Piping Technology custom designed these units to fit in the limited space available inside the furnace. The bolting patterns for the constants needed to be flexible enough that they could be attached to the supporting structure with any of the support system designs being considered.

Slide Plates: The “Sandwich” Concept
Piping Technology & Products, Inc. uses the “sandwich” concept when applying slide plates to our customers ‘ systems. Figure 1 shows a “sandwich” composed of two identical slide plates, one on top and another on the bottom. Each slide plate (which is like the bun of the “sandwich”) and a low coefficient of friction material which is bonded to the metal backing plate.

Slide Plates

Figure 1

Figure 1
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.

Slide Plate

Figure 2

Figure 2 shows an application in which a slide bearing plate is welded on top of one steel beam supporting the other beam. When the top beam moves (due to thermal expansion, for example) it slides across the surface of the bearing plate without contacting the supporting another beam. To return to our “sandwich” metaphor, the top half of the “sandwich” is bonded to the sliding beam, and to the bottom half to the supporting beam.

 

Want to learn more about spring hangers? Visit our webinar archives today!



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Pipe Shoes For 14" Pipe At A LNG Plant

November 30th, 2001 No comments
Pipe Shoes For 14" Pipe At A LNG Plant

Pipe Shoes For 14" Pipe At A LNG Plant

Pipe Shoes For 14" Pipe At A LNG Plant

Pipe Shoes For 14" Pipe

Piping Technology & Products, Inc. fabricated cryogenic pipe supports designed for a 14-inch pipe at a LNG plant in Algeria. The pipe operates below minus 50 degrees F, therefore the pipe supports were fabricated from three different materials in order to accommodate the low temperatures. The upper part, which clamps on to the pipe, was fabricated from a stainless steel plate that retains its strength at low temperatures. The middle section is a laminated phenolic block made from layers of wood impregnated under vacuum with a synthetic resin. A crossed orientation of the hard wood fibers is used to provide extra strength. The laminated phenolic block, which is a poor conductor of heat, was bolted to the bottom plate of the galvanized carbon steel.

Are you in need of some cryogenic pipe supports for an upcoming project? Get pricing today!

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1,728 Rods & Clevises

November 16th, 2001 No comments
1,728 Rods & Clevises

1,728 Rods & Clevises

Piping Technology & Products, Inc. custom designed and fabricated 1,728 rods and clevises for a heat recovery steam generation plant. The rods and clevises will be utilized to support various pipe loads throughout the piping system.

Learn more about rods and clevises by visiting our webinar archives!



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Type F Variable Springs With Specially Made Locking Devices

November 3rd, 2001 No comments

 

Type F Variable Springs With Specially Made Locking Devices

Type F Variable Springs With Specially Made Locking Devices

Piping Technology & Products, Inc. specially designed twelve Type-F variable spring hangers (4-160-F, 8-170-F, 8-180-F) for an oil refinery in Indiana. These variable spring hangers were custom designed to support a Hydro-Test load 4.5 to 5 times the design load, which ranged from 7,988 lb. to 13,075 lb. The spring rates of the variable spring hangers ranged from 500 lb./in. to 750 lb./in. with travels of 1.15″ to 2.82″, upward movement respectively. The locking devices for these springs were manufactured using basic materials (rods, hex nuts and heavy pipe wall) and a special pressure plate to accommodate the application design criteria requested by the client. The base plate designed for these F- Type cans were modified to accommodate the locking devices.

Learn more about variable springs by visiting our webinar archives!



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40" Diameter, Alloy Yoke Clamp

October 12th, 2001 No comments
40" Diameter, Alloy Yoke Clamp

40" Diameter, Alloy Yoke Clamp

PT&P specially designed and manufactured a heavy duty, 40-inch diameter, alloy yoke clamp (cut from a 6″ thick plate) for a Power Plant in Mississippi. The clamp was designed for a 70,000 lb load and is to support a 40″ diameter, high pressure main steam line. The u-bolt was made of a 3″ diameter bar. In order to prove the design of this clamp, Finite Element Analysis was used to simulate the loads and stresses that it may experience in the field. The model shows the stresses at every point by a color coding system.

Want to learn more about yoke clamps and other types of clamps? Visit our webinar archives today!


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Mailing: P.O. Box 34506, Houston, TX 77234-4506 Location: 3701 Holmes Road, Houston, TX 77051
Our Subsidiaries: U.S. Bellows: Metallic & Fabric Expansion Joints, Bellows
Sweco Fab: ASME Vessels, Pig Launchers, Spectacle Blinds
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Fronek Anchor/Darling
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