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Horizontal Upthrust Constants for a Power Plant

March 8th, 2006 No comments

 

Horizontal Upthrust Constants for a Power Plant

Horizontal Upthrust Constants for a Power Plant

Horizontal Upthrust Constants for a Power Plant

Multiple Constants During Inspection

The horizontal upthrust constants (Fig. PTP200-U) were fabricated from carbon steel and chrome-moly for a Heat Recovery Steam Generator. The constants range in sizes PTP-200 size 3 to 65 and weigh from 24 lbs to 1,300 lbs. They support loads of 100 lbs to 8,100 lbs. The constants support pipes and equipment subjected to vertical movement due to thermal expansion at locations where transfer of stress to other supports or equipment can be critical. Horizontal upthrust constants are utilized in areas where horizontal travel is unacceptable. Standard testing was completed for performance and quality assurance.

Want to learn more about constant springs? View a constant webinar today!



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March 2006 News

March 4th, 2006 No comments

Piping Technology & Products, Inc. Performed Field Services for a Power Generating Plant in Texas

PT&P was contracted to assist in the determination of pipe support maintenance at a power plant in Texas. The constant effort support springs with loads of excess of 9,500 lbs and the variable spring supports with loads of 450 lbs were marked for needing attention.

Inspecting Variable Springs for Performance

Cleaning Variable Spring Unit

Inspecting Variable Springs for Performance

Inspecting Variable Springs for Performance

PT&P’s objectives were to:

* Evaluate the pipe supports
* Determine state of performance
* Provide a plan of action
* Train personnel on-site to perform adjustments and replacement of supports or support components
* Provide final inspection of modified supports

After Cleaning & Preparation of the Constant

After Cleaning & Preparation of the Constant

Final Assembly with Added Slide Plates

Final Assembly with Added Slide Plates

The pipe supports needing attention could not be set to the required installation position. A plan was initiated to recondition some of the support components such as turnbuckles and rods. This would allow a greater range of field adjustment to the pipe supports. During a planned shut-down, PT&P Field Service Units returned to the site to modify the existing supports. The initial phase of the modifications included bracing the piping in order to isolate and lock the supports in position. Then, they were disconnected from the system and modifications to the assemblies were completed. Afterwards, the supports were reinstalled and any necessary adjustments were completed. A total of eight pipe supports were modified or adjusted.

Roller Bearing Needing Maintenance

Roller Bearing Needing Maintenance

Restored Roller Bearing

Restored Roller Bearing

Do you see a need for a routine inspection of your plant? Contact us for a quote today!
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Upthrust 200-U Type Constants for an Oil Refinery

February 28th, 2006 No comments

 

Upthrust 200-U Type Constants for an Oil Refinery

Upthrust 200-U Type Constants for an Oil Refinery

Upthrust 200-U Type Constants for an Oil Refinery

Upthrust 200-U Type Constants for an Oil Refinery

The upthrust constants (PTP Fig. 200-U) were fabricated from A36 carbon steel. Weighing at 4,150 lbs each, they measure 94” long, 27” wide, and 43” tall. They support loads from 90,700 lbs to 93,000 lbs with 4” of vertical travel. In addition, they are custom designed with extra supporting points for heavier loads. They are used to support the piping system from beneath the pipeline. Upthrust constants only allow for vertical travel and are used where horizontal travel is unacceptable. Standard load and travel testing was completed to assure quality and performance.

Do you require u-type constants in your plant or refinery? Let us price them for you now!
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Pre-Insulated Cryogenic Supports with PTFE, 25% Glass Filled, Slide Plates

February 22nd, 2006 No comments
Pre-Insulated Cryogenic Supports with PTFE, 25% Glass Filled, Slide Plates

Pre-Insulated Cryogenic Supports with PTFE, 25% Glass Filled, Slide Plates

 

Pre-Insulated Cryogenic Supports with PTFE, 25% Glass Filled, Slide Plates

Measuring Overall Length of the Support

Fifty Pre-Insulated Cryogenic Supports with PTFE, 25% Glass Filled, Slide Plates were manufactured for a 36” stainless steel piping system. The steel portion of the Cryogenic Supports is fabricated from ASTMA 240 Grade 304L stainless steel. The insulation used for the Slide Plate is Micarta, capable of supporting temperatures as low as -300°F. Each Pre-Insulated Cryogenic Support is 72” in length and weighs 2,000 lbs. It is designed to support the pipeline and accommodate 45” of axial travel at each support. They are used as Cryogenic Pipe Supports for a piping system that crosses a 1,000 foot suspension bridge.

Want to learn more about pre-insulated pipe supports? View a past webinar today!


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Hydraulic Snubber Extension Rod Ends

February 15th, 2006 No comments
Hydraulic Snubber Extension Rod Ends

Hydraulic Snubber Extension Rod Ends

Hydraulic Snubber Extension Rod Ends

Snubber Extension Rod Ends

The hydraulic snubber extension rod ends(seen above) were manufactured from carbon steel. Ranging in sizes 1 , 4, 5, and 6, the weight of each increase with size, therefore; the weight of each unit varies. Extension rod ends are used in conjunction with hydraulic snubbers to extend the overall length of an existing snubber. They are applied to piping systems when unrestrained thermal movement must be allowed but must also be restrained during impulsive or cyclic disturbance. The turn around time for these units was 3 weeks.

Want to learn more about snubbers? View one of our past snubber webinars today!


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3 Wedge Action Mechanical Joints for a Suspension Bridge

January 25th, 2006 No comments
3 Wedge Action Mechanical Joints for a Suspension Bridge

3 Wedge Action Mechanical Joints for a Suspension Bridge

Three wedge action mechanical joint restraints made of ductile iron materials were utilized to assist in the construction of a suspension bridge. Also, these mechanical joints provide for vertical and axial restraint for the bridge. Each weighs approximately 300 lb. and measures 24” long by 16” wide, and 12” tall for a 6”, 10”, and 12” ductile iron pipe. They are capable of supporting 50,000 lb. In addition, they are designed for seismic conditions with the ability for 7” of axial travel.

Do you require similar supports as those described above? Get pricing today!
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3 Cold Shoes for a LNG Plant in California

January 18th, 2006 No comments
3 Cold Shoes for a LNG Plant in California

3 Cold Shoes for a LNG Plant in California

3 Cold Shoes for a LNG Plant in California

Single Cold Shoe

These cold shoes are made of polyurethane for cryogenic pipe lines at a liquid nitrogen gas plant. They measure between 8” to 16” in diameter, 30” long with 4” of insulation. These cold shoes provide insulation in the support area where the regular pipe insulation (foam glass) is not sufficient to support the load.

Want to learn more about cold shoes? View a past cold shoe webinar today!


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88 Constant Supports for a Hydrogen Reformer Plant

January 4th, 2006 No comments
 88 Constant Supports for a Hydrogen Reformer Plant

88 Constant Supports for a Hydrogen Reformer Plant

These Figure PTP100-A size 40 and 51 constant supports, made of A36 carbon steel, are used to support pipeline systems. Each is 24″ long, 10 1/2″ wide, and 51 1/2″ high. These constants are capable of supporting loads ranging from 1,165 lb. to 2,260 lb. with a travel range of 13″ to 14 1/2″. PT&P specifically designed and fabricated each constant for specific dimensions provided by the customer. Standard load and travel testing was completed for quality assurance.

Do you require constants in your plant or refinery? Let us price them for you today!
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2 Sway Strut Hangers for a Power Generating Station

December 21st, 2005 No comments
 2 Sway Strut Hangers for a Power Generating Station

2 Sway Strut Hangers for a Power Generating Station

 2 Sway Strut Hangers for a Power Generating Station

Alternate View of Sway Struts

Sway struts are used to restrain movement of piping in one direction while providing for movement due to thermal expansion or contraction in another direction. These sway struts are made of ASTM A387 GR22 weighing at 1,485 lbs each. They are 6″ in diameter and 8’2″ long and are used for main steam valve supports with specifically designed spacers, pins, and retainers capable of restraining movement up to 90,000 lbs at high temperatures exceeding 750F. The turnaround time for this was 6 weeks.

Do you see a need for sway struts in your current application? Get pricing today!
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Roller Stands for a Company that Manufactures "Fired Heaters"

December 14th, 2005 No comments
Roller Stands for a Company that Manufactures "Fired Heaters"

Roller Stands for a Company that Manufactures "Fired Heaters"

Roller Stands for a Company that Manufactures "Fired Heaters"
Load Testing Rollers

Roller stands are used to support pipelines that expand and contract longitudinally in the axial direction and where vertical adjustment is not necessary. These roller stands are made of stainless steel and designed for a 26″ pipe. They weigh 160 lbs and are capable of supporting 7,500 lbs. Load testing at 1,000F was completed for performance assurance.

Do you require roller stands like those described above? Get pricing 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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: Snubbers, Sway Struts & Sway Braces
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