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Emergency Field Service Request on Constant
May 22, 2001
Emergency Field Service Request on Constant
Emergency Field Service Request on Constant

Piping Technology & Products, Inc. and its 24×7 Quick Turn/Emergency Service were put to the test on a Friday evening when they received an emergency call from a company located in Jamaica. The Jamaican company was concerned with existing pipe supports at their location and made a request for a PT&P field services representative to visit and inspect.

An experienced PT&P field services manager arrived at 8:00 p.m. on Saturday to survey and fulfill the request.

The reported problem was a pair of rusted and decayed spring hangers dating back to 1969. After inspection, PT&P’s field services manager concluded that the aged spring hangers could no longer support the piping system due to changes in the design of the system, whereas, failure resulted in additional forces being exerted onto the steam turbine.

Following identification of the measurements, load capabilities, and movements of the spring hangers, it was apparent that the system design did not compensate for the weight of two globe valves that were added to the system at a later date. Thus, PT&P’s field services manager had to take into consideration the weight of these two globe valves when sizing the replacement parts.

PT&P supplied and delivered two Type G variable spring assemblies to Jamaica on the following Monday. Type G assemblies can accommodate unusually heavy loads, and is especially adaptable for avoiding interference in spaces where headroom is limited. In this case, the spring assembly was supporting loads in excess of 2000 lbs. and movement was limited due to its location in the powerhouse.

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16’ Dia. x 20’ Carbon Steel Storage Tank
May 11, 2001
16’ Dia. x 20’ Carbon Steel Storage Tank
16’ Dia. x 20’ Carbon Steel Storage Tank

Dual cranes are required to lift the pictured 16’ x 20’ Carbon Steel Storage Tank to a flatbed eighteen-wheeler for transportation to the paint yard.Upon completion of painting and lining it will be shipped to a major producer of caustic soda in Corpus Christi, South Texas Area.

This is one of many (similar type) tanks and pressure vessels supplied for a recent plant expansion.

Learn more about tanks and vessels from our webinar archives.




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ASME Catalyst Storage Bins
ASME Catalyst Storage Bins
ASME Catalyst Storage Bins

Sweco Fab, Inc., the ASME code fabrication shop of Piping Technology & Products, Inc., designed and built eleven Catalyst storage bins for a large chemical company in Geismer, Louisiana. The catalyst storage bins were fabricated from 304 stainless steel and designed for 6 psig @ 300oF.

Want to learn more about various products of Sweco Fab, Inc. Visit out website webinars today!




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Pig Launchers and Receivers for Separation Project
April 22, 2001

 

Pig Launchers and Receivers for Separation Project
Pig Launchers and Receivers for Separation Project

SWECO Fab, Inc. manufactured eight 8″ and four 10″ pig launchers and receivers for a separation project off the West Coast of Africa. The products were immediately put to use for placement and removal of pigs. These launchers and receivers were designed with quick opening doors and R.T.J flanges at 2300 psig, built to ASME, Sect. VIII, Div. 1 and D.N.V. inspected.

Want to learn more about pig launchers and receivers? Visit our webinar archives today!


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Replacement of a Constant Spring Hanger
April 11, 2001
Replacement of a Constant Spring Hanger
Replacement of a Constant Spring Hanger

A large refinery plant located in Pasadena, TX called upon Piping Technology & Products, Inc. to aid them in the immediate replacement of a 5400 Lbs, 7 1/2″ travel vertical constant spring hanger used to support a Coker drum.

The constant spring hanger was damaged during servicing. The reliability engineer from the refinery contacted PT&P Wednesday evening to request an inspection by a PT&P field services representative. The following morning PT&P’s field services representative arrived on-site, inspected the damaged constant spring hanger and suggested that a replacement would be most efficient and cost effective. With the existing nameplate bolted to the constant, PT&P was able to easily locate the original design of the constant.

The original design, along with the convenience of the component parts being in stock inventory, allowed PT&P to quickly manufacture a replica of the constant and ship it out on the same day by 6 p.m.

In the past, lead times for delivery of constant supports averaged 6-8 weeks, however, through the process of maintaining stock components of interchangeable parts, lead time has been drastically reduced. Piping Technology & Products, Inc. maintains a large inventory of stocked constant support assembly components that allows them to quickly assemble and ship to customers on demand, especially in emergency/quick-turn situations.

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April 2001 News
April 10, 2001

PT&P Manufactures Custom Designed Embed Plates for Gold Mine in Cajamarca, Peru
Piping Technology & Products, Inc., designed and manufactured 150 special embed plate pieces for Latin America’s largest gold producer. This project involved the production of one hundred fifty, 93″ x 27″ x 1″ embed plates which required the use of 80,000 pounds of steel and anchors. The custom designed, carbon steel, embed plates are to provide stability for the feed openings of four mineshaft reclaim tunnels and are scheduled to be put to use immediately.

Custom Embed Plates for Gold Mine in Cajamarca, Peru
Custom Embed Plates for Gold Mine in Cajamarca, Peru

How to Avoid Pipe Stress
What is Pipe Stress?
“Pipe Stress” refers to piping flexibility analysis.

High Stress Locations on Pipes
High stress areas generally occur at piping elbows, tees and other branch connections. The B 31.3 Piping Code provides stress intensification factors for such locations. Computer piping programs generally do piping flexibility analysis for those other than very simple systems.

Signs of Pipe Stress
An overstressed system could fail by fatigue, leading to a crack, buckling of the elbows, or overload on equipment nozzles.

How to Reduce Pipe Stress
High stress should be uncovered in the design stage. However, existing systems can be checked for incipient cracks by x-ray, ultrasound, acoustic emission or dye penetrant. Also, rerouting the pipe can provide more flexibility and sometimes reduce high stress. When rerouting is impossible or not practical, then pipe stress can be reduced significantly by adding Bellows Expansion Joints. Any sections of the pipe showing cracks must be replaced.

Product of the Month

Transition Piece
Transition Piece
Transition Piece
Transition Piece

(at left)47.25″ I.D. x 23.625″ I.D. 5A516-70 Transition Pieces w/ 5A36 stiffner for ethylene plant in Saudia Arabia. (at right)47.25″ I.D. Universal Expansion Joint w/ SB443 round corners bellows, and SA516-70 flanges for ethylene plant in Saudia Arabia.

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Drag Force Test Proves Mechanical Snubbers Durability
March 20, 2001
Drag Force Test Proves Mechanical Snubbers Durability
Drag Force Test Proves Mechanical Snubbers Durability
Drag Force Test Proves Mechanical Snubbers Durability
Instrument Panel

Piping Technology & Products, Inc., recently performed its snubber cycle test to prove the durability of a MSA 35 mechanical snubber manufactured for an engineering and construction company at Pine Bluff, Arkansas.

The cyclic test, performed using PT&P’s in-house, horizontal, hydraulic press, is designed to test snubbers at their two modes of operation. At high rates of loading, especially impact, the snubber is expected to provide very high resistance to movement. At low speeds snubbers are to provide very low resistance to movement. Testing a snubber at a low speed displays the normal wear and tear over an extended period of time.

In this case, a cyclic test was performed, in which the MSA 35 Mechanical Snubber with a load rating of 50,000 pounds and design travel of 6 inches was measured at a slow speed response. The low speed force remained at a fairly constant 500 pounds for the 50 hours and 5000 cycles it sustained. This value meets the common criteria that the drag force should be 2% or less than the rated load.

In addition to the snubber cycle drag test, Piping Technology & Products, Inc. has administered other tests such as the burst test for expansion joints. The tests executed by PT&P allow companies to attain the most precise and reliable data available to them. Using this to their advantage, customers will be able to compare data about the recently ordered products, to their individual standards of dependability and durability.

Piping Technology & Products, Inc. and its wholly owned subsidiaries are recognized leaders in manufacturing pipe hangers/pipe supports (variables, constants, cryogenic supports cold shoes, hot shoes, mechanical/hydraulic snubbers, slide bearing plates), expansion joints/compensators (metallic, fabric, rubber, slip-type) and ASME Code Fabrication. PT&P has engineering drawing production stress analysis and full in-house finite element analysis that are used to prove designs. The design software is developed in-house and the calculations contrived are further checked using hand calculations.

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PT&P Aids in the Creation of a "Chemical Island" in Singapore
February 8, 2001

Piping Technology & Products, Inc. supplied a variety of pipeline products for the construction of a refinery plant on Jurong Island, Singapore. Jurong Island is a man-made island consisting of four petroleum refineries, 30 petrochemical firms, and many more industrial firms to support its existence.

PT&P Aids in the Creation of a "Chemical Island" in Singapore
PT&P Aids in the Creation of a "Chemical Island" in Singapore

PT&P and U.S. Bellows, Inc. first became involved in this extensive project in May 1998. During this time, PT&P supplied the international construction firm with more than 3,000 cold shoes, 400 slide plates and numerous more spring hangers, constants and fabricated pipe supports. U.S. Bellows, Inc., a wholly owned subsidiary of PT&P, also supplied many of the expansion joints used in the creation of this refinery. This includes three 36″ expansion joints were fabricated and sent to Singapore in October 1999. Two years, 300 jobs, and 670 tons of steel later, PT&P completed the last job for this project in September 2000.

PT&P Aids in the Creation of a "Chemical Island" in Singapore
PT&P Aids in the Creation of a "Chemical Island" in Singapore

PT&P has extensive experience performing product testing to ensure product quality and dependability. For this particular project a load test was performed on a 60″ diameter cold shoe. By measuring the axial and lateral loads, vertical tension and temperature, PT&P engineers are able to determine its maximum load.

Product testing was also performed on the three 36″ expansion joints provided. The bellows together with the hinge assembly were hydro-tested and a dry nitrogen test between the two plies was conducted to ensure that they would withstand the design pressure. These expansion joints were tested per ASME Sect. VIII Div. 1 Appendix 26 standards.



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PT&P Aids in the Creation of the "Chemical Island"
February 4, 2001

Piping Technology & Products, Inc. supplied more than 3,000 cold shoes, 400 slide plates and numerous more spring hangers, constants and fabricated pipe supports for the construction of a refinery plant on Jurong Island, Singapore. U.S. Bellows, Inc., also supplied many of the expansion joints used in the creation of this refinery.
Jurong Island is a man-made island consisting of four petroleum refineries, 30 petrochemical firms, and many more industrial firms to support its existence.

Tips on Corrosion Protection
There are four methods of protecting carbon steel pipe support components from corrosion; painting, zinc coatings, hot dip galvanizing, and combinations of these.  Painting has an advantage when appearance and choice of color are important. Modern painting systems may be appropriate protection in certain environments. Paint provides a barrier protection to a metal surface. The ability of zinc to provide cathodic protection for carbon steel in addition to barrier protection is a fundamental advantage. In most cases the reduction in life-cycle costs justifies the small additional cost of galvanizing. Indeed painting and galvanizing together can provide a synergistic benefit which may be justified in some cases.  For more information on corrosion, refer to https://devptp.fronekgrp.com/resources/technical-bulletins/corrosion-protection/

PT&P’s Diverse Product Testing
Piping Technology & Products, Inc. is a recognized leader in pipe supports, pre-insulated pipe supports, miscellaneous fabrication and expansion joints and has extensive experience with several different types of product testing. This includes :

* Load Testing : The objective of the load test is to determine the maximum load for pipe supports and other products. Load tests are done on an assortment of pipe supports.

* Snubber Testing : The objective of the snubber cycle test is to (1) display the normal wear and tear for a snubber over an extended period of time, and (2) display the resistance to an abrupt disturbance.

* Burst Testing : The objective of the burst test is to determine the ultimate pressure resistance. Primarily conducted on bellows.

See more about testing on our site:  Product Testing

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Specially Designed Spring Supports Ready for Shipment to Egypt
September 8, 2000
Specially Designed Spring Supports Ready for Shipment to Egypt
Specially Designed Spring Supports Ready for Shipment to Egypt

These supports are key components for the steam generators in a thermal power plant. The coils are coated with neoprene (black) to prevent corrosion while the steel plate and tie rods are painted white. Engineers of Piping Technology & Products, Inc. designed these units to support loads of 110,000 kips.

In need of specially designed pipe supports? Get pricing now!

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