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Posts Tagged ‘Fabrication’

An interesting project has come to our shop that is leading to a new welding procedure. The project is a simple stainless steel pressure vessel, 6” diameter pipe, 0.432” wall approximately 18” long. While this seems overly simple it has led me to investigate the welding options we have qualified for stainless in our shop. We have stainless hardwire, flux core, stick, and TIG procedures but which one to use? Flux core fills very fast, hardwire is clean and neat, TIG has an artistic look when done right but is slower then hardwire and flux core. Stick welding is smoky and unless the welder is REALLY good it just doesn’t look as nice as the others. I’m beginning to think multiple processes. If we hardwire the root then no backing gas is required (meaning we don’t have to purge the inside of the vessel to remove any oxygen exposure on the back side of the weld) then we can fill the majority of the weld joint with either spray arc hardwire or flux core and finish with TIG. We get a solid, quick welded joint that looks like art! But I don’t have a weld procedure that includes three different welding processes. Do I need to break out some stainless steel scrap and weld up a coupon using the three selected processes and have it tested? Conveniently, I do not. Because I have Procedure Qualification Reports (PQR’s) for all three processes I can write a new procedure using the existing PQR’s. I can take the information from each PQR and implement a new procedure that includes all three processes. Each process must be noted on the new weld procedure and the essential variables must also be noted. One other item to be sure to review, the thickness of the additive PQR’s must yield the thickness range required for the intended joint. Maintaining documentation of all our welding processes and procedures makes this an easy accomplishment, an accomplishment that allows us to utilize our knowledge and history to go forward. If you like the way a certain welding process looks but have been told it costs too much or takes too much time, give us a call. We’ll help you find a happy medium that yields beautiful welding and cost effectiveness.

TIG Cover Pass

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Since this summer Precision Pipe and Vessel, A Denver ASME welding and fabrication shop has built and delivered two 80 foot plus deethanizor and depropoanizer towers.  By all standards these are not the largest towers on the market, but are a large enough to serve a major sector in gas processing plants.  These towers were built in Denver and will be shipped all the way to Pennsylvania for their final installation.  This project was conducted with a Nationwide RFP process and it was discovered the Precision Pipe had a competitive price (even with expensive trucking costs) and even better delivery schedule.

As the gas boom seems to be gaining traction, it seems many ASME shops are becoming back logged with large vessels such as these.  Many gas processing companies turn to the same fabricators over and over again and are willing to wait months for delivery at the expense of production and revenue.  As project managers become familiar with companies they tend to turn to the same companies time and time again.  This is probably a safe bet with long established business relationships, but the petroleum is a high risk high reward kind of business.  From the early stages of drilling, installation, permitting, and well stimulation this is in all reality a high stakes business.

Any company that is seeking a competitive edge should be looking for energetic and motivated businesses qualified to provide the same products on a better delivery date (any ASME code vessel will require the same QA QC and inspection).  The cost of lost production is much more expensive than a few thousand dollars in added cost or even shipping, yet procurement specialist and project managers turn to the same companies over and over again without looking at the competitive advantage they may have by using a new vendor with better delivery times.  As dollars are wasted waiting for equipment it seems more logical to strike up new business relationships based on better delivery schedules. Give us a call and see if we can get you to revenue quicker than your go to guy, you might be surprised!

http://www.precision-pipe.com

Natural Gas Processing Equipment

304 Stainless deethanizer tower

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Denver, CO – July 19, 2011 – We are thrilled to announce today the introduction of our groundbreaking liquid carbon dioxide based fabric and textile cleaning machine. CO2Nexus is a Denver, CO-based company dedicated to developing equipment and consumables that use liquid carbon dioxide (CO2) to clean fabrics and textiles. We are a spin-out of the premier worldwide CO2 R&D entity – FeyeCon Development & Implementation B.V. We are also pleased to announce our partnership with Denver-based Revolution Cleaners, who will field the first dry cleaning unit at their Denver plant.
Liquid CO2 – the same substance that puts the fizz in every carbonated beverage – has excellent solvent properties and is intrinsically sustainable, since it is in-exhaustible, cheap, non-toxic, non-hazardous, non-flammable, and cannot spill into the soil or groundwater. Chemical based solvents currently used in the dry cleaning industry are being phased out and/or have health and liability risks. Water based laundering methods are taxing already severely depleted water resources, especially in the Western U.S.
The CO2 used in the CO2Nexus systems is recycled from existing industrial processes and as such is completely carbon neutral.
CO2Nexus will also field a system later this year targeting the industrial laundry market, in partnership with one of the largest U.S. based service providers in that market. Industrial laundry uses water as the primary cleaning solvent.
Richard Kinsman, CEO of CO2Nexus comments: “Chemical and water based dry cleaning and laundering methods have real consumer marketing and environmental-health liabilities that will only get worse. At the same time, the performance, operating costs, sustainability and consumer marketing benefits of CO2 are attractive and will continue to get better, which is why we believe it to be the best long term option. Our association with FeyeCon on the technology side, and with the primary service providers at the industry level assures us that we have both the scientific and practical basis to implement the technology.”
CO2Nexus will offer commercial units starting in Q1 of 2012.
Denver-based Precision Pipe & Vessel, LLC will serve as our manufacturing partner. Mr. Kinsman: “PPV has tremendous know-how and a real track record in gas processing equipment and components. They bring tremendous value to our organization and we are proud to be partnered with them.”
Edward Pizzarello of Revolution Cleaners confirms their involvement: “We’re excited to be able to install the first unit in our facility. Revolution Cleaners has been on the leading edge of CO2 cleaning in Denver for over 6 years. CO2 has been our only cleaning solvent, and we’re thrilled with the opportunity to move to the next generation of CO2 cleaning technology.”
State and federal agencies have established grant based incentives to encourage the adoption of CO2 based systems, beginning in CA. Other states are anticipated to follow.
About CO2Nexus Inc.
CO2Nexus Inc. designs and sells equipment that uses recycled liquid carbon dioxide (CO2 ) to replace water and chemical based cleaning solvents in dry cleaning and industrial laundry.  Liquid CO2  – the same substance used to “fizz” beverages –  is an intrinsically excellent cleaning solvent and, unlike other solvents, is in-exhaustible, cheap, non-toxic, non-hazardous, non-flammable, and leaves zero secondary waste. www.co2nexus.com
About Revolution Cleaners
Revolution Cleaners cleans exclusively with recaptured, liquid carbon dioxide (CO2 ) & water (H2O); positioning themselves as the most experienced dry cleaner in Colorado using these methods. CO2  and H2O are naturally effective cleaning agents for a wide range of garments and household items. The absence of heat in Revolution’s  cleaning process ensures that stains come out more readily and garments have a longer life. With Revolution, your clothes are cleaner, softer and fresher than with traditional dry cleaning methods. www.revolutioncleaners.com
About Precision Pipe & Vessel
Precision Pipe & Vessel (PPV) is a Denver-based fabrication facility with extensive experience in gas processing, alternative energy and the cleantech industry. They offer top notch engineering, fabrication and product development services to clients across the US. With a track record of successfully serving customers for over 30 years PPV has proven themselves to be a reliable and effective fabrication facility. www.precision-pipe.com

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An interesting project has come to our shop that is leading to a new welding procedure. The project is a simple stainless steel pressure vessel, 6” diameter pipe, 0.432” wall approximately 18” long. While this seems overly simple it has led me to investigate the welding options we have qualified for stainless in our shop. We have stainless hardwire, flux core, stick, and TIG procedures but which one to use? Flux core fills very fast, hardwire is clean and neat, TIG has an artistic look when done right but is slower then hardwire and flux core. Stick welding is smoky and unless the welder is REALLY good it just doesn’t look as nice as the others. I’m beginning to think multiple processes. If we hardwire the root then no backing gas is required (meaning we don’t have to purge the inside of the vessel to remove any oxygen exposure on the back side of the weld) then we can fill the majority of the weld joint with either spray arc hardwire or flux core and finish with TIG. We get a solid, quick welded joint that looks like art! But I don’t have a weld procedure that includes three different welding processes. Do I need to break out some stainless steel scrap and weld up a coupon using the three selected processes and have it tested? Conveniently, I do not. Because I have Procedure Qualification Reports (PQR’s) for all three processes I can write a new procedure using the existing PQR’s. I can take the information from each PQR and implement a new procedure that includes all three processes. Each process must be noted on the new weld procedure and the essential variables must also be noted. One other item to be sure to review, the thickness of the additive PQR’s must yield the thickness range required for the intended joint. Maintaining documentation of all our welding processes and procedures makes this an easy accomplishment, an accomplishment that allows us to utilize our knowledge and history to go forward. If you like the way a certain welding process looks but have been told it costs too much or takes too much time, give us a call. We’ll help you find a happy medium that yields beautiful welding and cost effectiveness.

Denver Stainless Steel Welding

TIG Cover Pass

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New Year, new beginnings- same results?  That is not so bad when the last year was successful – or is it?

Recently, I have noticed that I am currently NOT doing much in the way of self-improvement other than maintaining the successful practices I have adopted last year.  On the surface this seems benign – after all, if it’s working, why change?  I can’t help but think…..what if?  What if I can add or tweak some of those successful things 2-5% for the better?  Wouldn’t that be worth the time investment to enhance what I do well? Certainly.

In business, we often focus our attention on our defects over the past year and give our organization the same old pep talk involving words such as, “We cannot continue…and/or Knock it off.”  This exercise is well worth the time and effort.  Making efforts NOT to repeat mistakes is always a worthwhile endeavor especially when your competency and reputation is on the line.  What about the things you do well?  Does your organization look to improve upon the good things that you do, even if it is “just” a 2-5% improvement.  (Example:  If your organization is good at turning quotes around what if you improved it by a couple of hours?  Soon, those hours – turn into day(s).)

Sometimes the smallest of efforts to improve what you do well can pay the biggest dividends.

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Interestingly enough, I have not noticed requirements of regulations in customer specifications regarding the concept of welder continuity. Welder continuity is the idea that a welder must continue to weld using a given process within a six month period to remain a “qualified welder” (See ASME Sec. IX, QW-322). ASME Section IX states that if a welder “has not welded with a process during a period of six months or more” he must be re-qualified. So just because a welder has passed a GMAW weld procedure qualification in the past does not mean he is qualified for the rest of his life. For example, if a shop makes a welder pass welding tests for GMAW and GTAW in order to be hired but then only uses the welder for GMAW for the next eight months the welder’s GTAW qualification has expired and he must be re-qualified. You’re probably thinking, “what a pain” and you could be right! If you do not have a continuity log for your welders showing the welding processes they have used within a six month period since they qualified it could get very difficult to remember who is still qualified for what! Continuity Log. This is a simple spread sheet that records the date and procedure a welder passed the qualification test and then maintains a running log recording that a welder has used the welding process every six months. I underline process because if you have multiple welding procedures for the same process (GMAW for carbon steel and stainless steel, etc.) then the welder remains qualified for every weld procedure he has successfully tested for within the same PROCESS by welding any of the weld procedures within that process. Every six months you simply review the log and record a date and a reference number (to either a job, a part, a test) that the welder was working on for a given process. If the welder has not used a process in the six month period you simply grab a couple of pieces of scrap material and have him weld it for you. Then record the job number and move to the next welder. It seems very simple and it is. Even if you use rig welders or a mobile welding service you can call and have them stop in for an hour to make a weld or two then record it on the log. The nice thing about the log is you always have a reference to review for which welders are qualified for your welding procedures if you keep it up to date. The bad thing is it only comes around every six months which makes it really easy to put on the back burner and forget about. When it comes time for a quality audit and someone asks to see it or asks how you keep track of your welder qualifications it can become a simple check mark or a sticking point. Feel free to stop by Precision Pipe & Vessel and ask to see our welder continuity log. We like check marks!

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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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