Posts Tagged ‘Colorado’

Precision Pipe & Vessel, is a Denver based ASME welding and equipment fabrication business with ‘NB’ ‘U’ & ‘R’ Stamps and certification. Precision Pipe  designs and builds individual components and complete turnkey skid packages. Precision Pipe has successfully completed more than 4500 jobs since 2000 which include small piping jobs, repairs of pressure vessels, TEMA Type Heat Exchangers, Pressure Vessels, and complete turn key skid packages.

Precision Pipe has a long history of providing cost competitive turnkey packages complete with electrical, instrumentation, controls, and complete engineering packaging. Precision has designed and built many components for installation including: Natural Gas Processing Plants (JT & Refrigeration), Separation, Refrigeration Packages, Dehydration, Compression, Chillers, Line Heaters, Production Units, Cabin Heaters, Tanks, Towers, Stacks, Flares, Boilers, Land Fill Methane Collection.

Although Precision Pipe specializes in Chemical, Oil & Gas processing equipment and facilities, Precision Pipe also has significant domain experience in Renewables, Co2, Prototyping and other process equipment. Precision is staffed with a team of professionals with diverse backgrounds, ingenuity, and the willingness to take risk. We find satisfaction in developing new products and building prototypes. Precision Pipe has helped dozens of companies (including ourselves) develop new products, build fully functional demonstration facilities, and seek patent protection for these innovations. Our product development experience includes gas processing equipment, catalyst, fixed and mobile laboratories, reactors, gasification, alternative fuels, cellulosic biofuels, clean tech, directional drilling, fracking, textiles, cosmetics, pharmaceuticals, oder & emissions elimination, distillation, traditional and renewable energy related developments.

At Precision Pipe We are always looking for ways to save our customers money, improve lead-time, and deliver an excellent product. If you haven’t had a chance to work with us, give us a call,  we would love the opportunity to partner with you.IMG_3019

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Last month I went to an AWS meeting and had a very interesting conversation with a rig welder who owned his own business. We were discussing the work available in the Colorado region and he mentioned that he was doing some repairs on pressure vessels. Curiously I asked if he had a current R stamp or if the company he was working for had a current R stamp. He replied, “I’m just working on some nozzles so they told me I don’t need an R Stamp”. This caught me by surprise. I had understood that any weld on a pressure vessel was part of the ASME code boundary and would require a procedure along with several other items to be approved by an Authorized Inspector prior to work beginning. Not wanting to sound foolish I decided to hold my tongue and do some research within ASME Section VIII, Division 1. Although my definition was somewhat simplified the mind set was correct. Here’s an excerpt from the 2007 edition/2009b addenda of the code:

“U-1(e) In relation to geometry of pressure containing parts, the scope of this Division shall include the following:

U-1(e)(1) where external piping; other pressure vessels including heat exchangers; or mechanical devices, such as pumps, mixers, or compressors, are to be connected to the vessel:

(a) the welding end connection for the first circumferential joint for welded connections [see UW-13(h);

(b) the first threaded joint for screwed connections;

(c) the face of the first flange for bolted, flanged connections;

(d) the first sealing surface for proprietary connections or fitting;”

The list goes on and for the sake of losing whoever might be reading this I’ll leave it to the reader to look up the rest. Let me summarize U-1(e): The code boundary includes any weld joining a nozzle to the main vessel body, the coupling for threaded connections, the weld connecting a weld neck flange AND the flange connected to the piping connected to the main vessel body. Further in U-1(e) the blind flanges or “pressure retaining covers” are also included in the code boundary. Does this impact the way work is performed on vessels here at Precision Pipe & Vessel, LLC? No. We have a current R Stamp issued by the Nation Board of Boiler & Pressure Vessel Inspectors. But for those of you welders and welding companies that are working on ASME certified and registered pressure vessels without an R Stamp I would recommend you stop until you get one. You are accepting the liability of the pressure vessel repair without a qualified Quality System and are by-passing the systems put in place to protect the public from catastrophic failures. If you have a minute check out the 2004 reference on the US Chemical Safety Board website (there’s a link at the end of this blog). The ASME (American Society of Mechanical Engineers) and the NBIC (National Board Inspection Code) codes were written in response to failures of boilers and pressure vessels over the years. They are for the safety of the public. Beware of people and businesses that go around the proper steps of repairing boilers and pressure vessels.


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