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Posts Tagged ‘Denver Welding’

Having a market advantage is a huge goal for most companies especially during market down turns.  Often times a company may have such an advantage and not know it, or at least not know how to capitalize on such opportunities.  One market segment that Precision Pipe excels at and enjoys is building Dew Point Processing Plants also know as refrigeration plants, NGL, or Natural Gas Liquids Plants.  What sets Precision Pipe & Vessel aside from our competitors is we have many different approaches to building gas processing equipment that other fabricators don’t consider or offer to their customers.

Our approaches include remanufacturing used equipment in a quality manner giving the appearance the equipment is new (often times it is as good as new).  We also painstakingly examine and inspect each mechanical component to ensure reliability and give estimated time before component overhaul.  We also build complete brand new plants from the skid up.  All of our products are turn key with complete instrumentation and piping interconnect as specified by each customer.  As soon as the plant has been connected to utilities and the associated site piping our systems are ready to be started up and turned over to operations.

Our most recent gas plants have taken yet another approach that provide the longevity  and the associated technology of new and modern Gas Plants yet maintain the cost savings of remanufactured equipment.  Recently we have assembled a plant that used brand new wear components such as a refrigeration compressor, glycol pumps, instrumentation, heat exchangers, and other moving components.  However, we created substantial saving to our client by using ASME pressure vessels and a glycol re-boiler off of used equipment.  We simply identified vessels in our inventory and evaluated condition and specification according to the refrigeration plant.  Next, we transplanted the vessels onto the new skid and re-registered the vessels with the National Board.  This process cut months out of the fabrication schedule and reduced the cost of the plant by nearly 30% for our customer.

When it was all said and done we shipped a modern gas plant to our customer complete with computerized controls and modern instrumentation at a greatly  reduced cost.  We were also informed by our customer that our delivery was several months quicker then the next best offer.  As it stands today the plant has operated for nearly a year with no shut downs and only routine maintenance performed.  This has become a good case study for cutting costs and improving our customers ROI by using creative and alternative fabrication techniques.

Precision Pipe and it’s staff has fabricated nearly 100 NGL plants over the last 30 years that are operating in various locations in North and South America.  We have developed a reputation for finding good quality used equipment, rebuilding our customers antiquated systems, and building brand new equipment to operate in todays modern gas fields.  Precision Pipe

NGL Plant

Precision Pipe uses new and used equipment to build great products

is a fully qualified ASME code shop (U,R,S, & NB stamps) that specializes in gas processing equipment, gasification, alternative energy, and product development engineering and fabrication.

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At Precision Pipe we have built a variety of vessels configured in every way one could possibly imagine.  Yet, we are always surprised by new ideas that come through our doors.  As a company that strives to exceed our customers expectations we are always looking for new ways to save money and bring value to our clients projects.  Recently, we were asked to bid on stainless steel vessels that are ASME rated above 1000 PSIG.  We returned a bid as requested but we also supplied an alternative bid using carbon steel that still meet the needs of the project but had the potential to save several thousand dollars off each pressure vessel.

How do you make a stainless steel vessel out of carbon steel?  There is the age old technique of cladding a vessel with stainless steel welding wire.  However, it is ugly, time consuming, and even distribution is unlikely.  In this particular case the esthetics of the vessels (inside and out) were equally important as the function.  Thus, we needed to supply quality, function, and appealing form to the project. What we have accomplished is Precision Clad.  We have effectively used seal welded stainless steel liners with stainless head and nozzles.  Using this methodology we have made the entire inside surface a stainless steel ASME pressure vessels while replacing the expensive, thick, and  high pressure shells with less expensive carbon steel.  In times like these Precision Pipe knows our clients need ways to get their projects finished in economically feasible ways.  However, this is not a new trend for Precision Pipe but an ethos of our company with 30 years of practice.

The results of these vessels have been well received and the savings have been remarkable.  In addition the vessels look great inside and out, they are 100% functional as corrosion resistant, this is Precision Clad.

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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.

http://www.csb.gov/newsroom/detail.aspx?nid=293

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