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The Pipe Supports Blog

Constant Spring Assemblies Custom Designed for Replacement of Failed Supports

December 15th, 2009 No comments
Constant Spring Assemblies Custom Designed for Replacement of Failed Supports

Constant Spring Assemblies Custom Designed for Replacement of Failed Supports

Constant Spring Assemblies Custom Designed for Replacement of Failed Supports

Failed Constants

This initial order included PT&P’s field services division testing and recalibrating four constant spring supports not manufactured by PT&P. A preliminary inspection of the original constants revealed deformations in the spring coil housing. This is indicative of defective coils; therefore, before any load tests were conducted, inspection windows were cut into the spring coil cover to confirm the initial hypothesis (Figure 2). Inspection of the coils revealed complete deterioration with broken and missing sections of the spring. Subsequent inspections of the remaining three assemblies illustrated similar failures. The original constants were then disassembled (Figure 3) to determine the feasibility of replacing only the coils while utilizing the original frame/cam components.

Constant Spring Assemblies Custom Designed for Replacement of Failed Supports

Failed Constants

The original spring coils were different in spring rate, length, and diameter than any standard PT&P coils; therefore, multiple coils were required to duplicate the overall function of the existing coils. Using multiple coils also required modifications to the existing frames. In an effort to expedite the overall delivery schedule, entirely new constant springs were manufactured in one week (Figure 1). The four new constants measure 53″ long, 13″ wide and 86″ tall. They have a 18-3/4″ diameter spring coil with a coil housing of 20-1/2″ diameter. The new constant assemblies are designed for an operating load of 13,332 lb., travel of 13″ upward and 2″ downward for a combined total travel of 15″. A load test throughout the total travel range was performed on each constant.

Want to learn more about constant springs? Watch a recording of a past constant webinar today!
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Billet Style Clevises & Turnbuckles for Temperatures up to 1000ºF for a Power Plant

December 8th, 2009 No comments

 

Billet Style Clevis

Billet Style Clevis

The clevis and turnbuckle pictured are each fabricated from individual solid pieces of 304H stainless steel. The 304H material, which has a maximum carbon content of 0.06%, was required because these items are designed to be used in an environment with temperatures up to 1000ºF. The customer’s specifications mandated that no welding would be allowed on either the clevises or turnbuckles. Additionally, no forgings were readily available, so blocks of 304H stainless steel were utilized in this design.

Billet Style Turnbuckle

Billet Style Turnbuckle

Both the clevises and turnbuckles are made to accommodate rod diameter ranges between 1-1/4″ to 1-3/4″. These components have a maximum load capacity of 18,600 lb. The clevises measure 3″ thick x 5-1/4″ wide x 10-5/8″ tall. The turnbuckles measure 2″ thick x 4″ wide x 9-1/4″ tall. Prior to fabrication, each component was modeled using finite element analysis to determine that stress levels are within the acceptable range.

Do you require some pipe support hardware for your project? Get pricing today!

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November 2009 News

November 25th, 2009 No comments

PT&P is Now ISO 9001:2008 Certified (11-23-2009)
Piping Technology & Products, Inc. is awarded the ISO 9001:2008 certificate by DNV Certification, a division of Det Norske Veritas (DNV), for the Manufacture of Hot and Cold Pipe Supports. This certificate proves that PT&P’s Quality Management System has been certified against the best practice standard and is compliant.

ISO 9001:2008

View ISO 9001:2008 Certificate

The latest version of standards, ISO 9001:2008 is created by the International Organization for Standardization (ISO), who set international requirements for Quality Management Systems. By conforming to the Quality Management System, Piping Technology & Products, Inc. demonstrates predictability of internal operations and the ability to meet customer requirements. While becoming certified, a company can identify the areas that are most critical to operations through management system audits. Once problem areas are identified, measured, managed and improved, customer satisfaction will rise, staff responsibility and motivation will also experience growth.

25-7/8″ Diameter High Temperature Supports for a Rush Job

November 17th, 2009 No comments
25-7/8″ Diameter High Temperature Supports for a Rush Job

25-7/8″ Diameter High Temperature Supports for a Rush Job

PT&P fabricated hot shoes with an insulation thickness of 2 ½” and a pipe size of 20″. The supports are fabricated from carbon steel with a red oxide finish and calcium silicate insulation. They are capable of loads up to 3400 lb. and temperatures ranging from 40°F to 1200°F. PT&P completed delivery for this rush job within two weeks.

Want to learn more about hot shoes? Instantly watch a pre-insulated support webinar today!

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4″ to 14″ Diameter Spectacle Blinds for Process Piping

November 10th, 2009 No comments
4″ to 14″ Diameter Spectacle Blinds for Process Piping

4″ to 14″ Diameter Spectacle Blinds for Process Piping

 

4″ to 14″ Diameter Spectacle Blinds for Process Piping

4″ to 14″ Diameter Spectacle Blinds for Process Piping

Sweco Fab, Inc., a division of PT&P, fabricated a variety of six spectacle blinds that will be used for selective line isolation. The spectacle blinds are fabricated from A516-70 carbon steel with sizes ranging from 4″ to 14″ diameter and per ASME B16.48 code. The function of a spectacle blind is to allow a line to be in either full shut-off mode or full flow mode, depending on which side is being utilized. Spectacle blinds are a lower cost alternative to double block and bleed valves where OSHA requires positive isolation of piping segments for safety reasons.

Want to learn more about spectacle blinds? View a webinar about Sweco Fab today!
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Hydraulic Snubber and 3-Bolt Clamp Assemblies for a Refinery Expansion Project

November 3rd, 2009 No comments
Hydraulic Snubber and 3-Bolt Clamp Assemblies

Hydraulic Snubber and 3-Bolt Clamp Assemblies (Item #2 & #3)

Hydraulic Snubber and 3-Bolt Clamp Assemblies for a Refinery Expansion Project

Hydraulic Snubber (Item #1)

Fronek Anchor/Darling Enterprises, Inc. and PT&P designed and fabricated hydraulic snubber and 3-bolt clamp assemblies for a refinery expansion project in Louisiana. A cycle test throughout the full stroke from zero to fully extended was performed prior to shipping.

Item #1: C-C: 61″, stroke: 12″, cylinder size: 5″ dia., max. load: 50,000 lb., 3-bolt clamp: A240 Gr. 304 SS, pipe size: 12″

Item #2: C-C: 71-7/8″, stoke: 6″, cylinder size: 4″ dia., max. load: 30,000 lb., -bolt clamp: A-36 carbon steel, pipe size: 16″

Item #3: C-C: 85-5/8″, stoke: 6″, cylinder size: 4″ dia., max. load: 30,000 lb., -bolt clamp: A-36 carbon steel, pipe size: 16″

Do you see a need for snubbers or clamps in your piping system? Get pricing today!
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48 Sway Braces for a Refinery Expansion Project.

October 27th, 2009 No comments
48 Sway Braces for a Refinery Expansion Project

48 Sway Braces for a Refinery Expansion Project

The carbon steel sway braces for this project range in length from 88-3/8″ to 95-3/4″. The largest sway brace has an operating load of 18,000 lb., a design travel of 12″ in either compression or extension, and a spring rate of 1416 lb. per inch. The smallest sway brace has an operating load of 7000 lb., a design travel of 8″ in either compression or extension, and a spring rate of 1000 lb. per inch.

The anticipated loads and movements exceed those of the largest standard PT&P sway brace; therefore, these sway braces required a custom design and fabrication. Each of the 48 sway braces are configured with a unique combination of spring coils, housings, and internal components to accommodate the non-standard loads and movements.

Do you require sway braces for a current or upcoming project? Let us price them for you!
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Slide Plate Assemblies with Marinite® Insulation and Vibration Pads

October 20th, 2009 No comments
Slide Plate Assemblies with Marinite® Insulation and Vibration Pads

Slide Plate Assemblies with Marinite® Insulation and Vibration Pads

The slide plate assemblies were fabricated from a combination of stainless steel for the low-friction sliding surface and 2-3/4″ Marinite® insulation to isolate the higher temperatures. A fabric reinforced isolator pad was placed between the slide plate and the I-beam for vibration control. The slide plates were tested for both load and heat transfer and will be utilized in a chemical plant.

Do you need slide plates for your application? Let us price them for you today!
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Categories: Slide Plates Tags: ,

Pig Launcher and Receiver with a GD Closure for a Plant on Sakhalin Island, Russia

October 13th, 2009 No comments
Pig Launcher and Receiver with a GD Closure

Pig Launcher and Receiver with a GD Closure

Both pig launcher and receiver are fabricated from various low temperature carbon steels. They also include a GD Closure built to ASME Section VIII specifications. The operating temperature range is from -35°C to 65°C. The receiver is 33′ long and the launcher is 20′ long. Both have a 24″ diameter major barrel feeding into a 16″ diameter minor barrel. A rugged three coat paint system was applied per customer specifications. Various tests were performed, from hydrostatic and dye-penetrant to full radiography and ultrasound.

Want to learn more about pig launchers? Instantly view a past webinar on pig launchers!

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Riser Clamp for a 30″ Diameter Vertical Pipe at a Power Plant

October 5th, 2009 No comments
Riser Clamp for a 30" Diameter Vertical Pipe

Riser Clamp for a 30" Diameter Vertical Pipe

This carbon steel riser clamp is designed for an operating load of 22,400 lb. at 650°F, and has a hot-dipped galvanize finish. It is fabricated from 1¾” x 12″ bar stock with an overall length of 86″. PT&P has an extensive inventory of all types of pipe clamps made from carbon steel with galvanized or black finishes. Clamps from alloy steels for high-temperature applications are also available.

Do you see a need for riser clamps in your plant? Let us price them for you 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
 Pipe Shields: Pre-Insulated Pipe Supports, Slides, Guides & Anchors

Fronek Anchor/Darling
: Snubbers, Sway Struts & Sway Braces
Phone: (713) 731-0030 Toll-Free: (800) 787-5914 FAX: (713) 731-8640 info@pipingtech.com

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