Category: Pipe Welding

NCPWB Technical Bulletin Summarizes Changes to ASME Section IX, 2021 Edition

A Technical Bulletin just issued by the National Certified Pipe Welding Bureau (NCPWB) addresses significant changes made in ASME Section IX, 2021 edition, that are of interest to mechanical contractors and piping fabricators. Opinions expressed in this article are Mr. Sperko’s, not the official opinion of ASME BPV Standards Committee IX. These changes become mandatory for new qualifications January 1, 2022. Find out more by clicking on the link below.

NCPWB Technical Bulletin

Resource Highlight: NCPWB’s Tools to Reduce the Cost and Risk Associated with Welding and Brazing

Each week, MCAA will highlight one or more of the educational resources that are free to MCAA members as a benefit of membership. This week, we focus on Tools to Reduce the Cost and Risk Associated with Welding and Brazing. This resource highlights the many ways that the National Certified Pipe Welding Bureau (NCPWB) keeps contractors informed about welding and brazing technology, and simplifies welding and brazing qualification practices.

You will learn how the NCPWB can help your company:

  • Save time by using qualified welding and brazing procedures
  • Lower your cost of qualifying welding and brazing procedures
  • Reduce your risk of noncompliance
  • Access qualified welders nationwide
  • Access technical experts in welding and brazing
  • Access local and national educational programs

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Have Questions or Need Personal Assistance?

Contact MCAA’s Nick Nikpourfard.

Three NEW NCPWB Webinar Resources on Piping Codes, ASME Code Welding Requirements & Internal Oxidation with Walter Sperko

Piping Codes and Welding for Mechanical Contracting Managers

There are key aspects about pipe welding that Project Managers and supervisors must understand in order to be sure that welds their company makes are suitable for service and meet contract and Code requirements. Despite the idea that codes are difficult to meet, when properly understood and followed, they can protect a contractor from unreasonable demands by owners and their engineers. Knowing what codes cover allows managers to identify unusual and costly requirements in customer specifications. Understanding what goes on in assembling and welding pipe joints illustrates the importance of performing inspections at critical steps. Codes impose radiography or ultrasonic examinations and customers frequently add additional requirements and knowing how to manage those requirements on a project can make or break a job.

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Internal Oxidation for Piping Welds

When welding stainless steel and nickel alloy piping using an open root or consumable insert, the root side of the joint (i.e., the inside surface of the pipe at a weld) must be protected from the oxygen in the atmosphere, otherwise the liquid weld metal will oxidize badly creating a surface that is not only discolored but is also quite rough. This roughness and discoloration will reduce the corrosion resistance of the metal at the weld.  In this webinar you will learn what is acceptable level of discoloration of the root side of the stainless-steel pipe weld and provides general guidance on the level of root surface discoloration that can be tolerated for some service conditions

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The Easy Way to Meet ASME Code Welding Requirements

A contractor has liability when contracts specify meeting ASME B31 Codes. When it comes to welding procedures and welder qualification, meeting those requirements can be challenging. Those responsibilities can be met easily as members of the NCPWB by following a few simple rules that will be explained during this presentation.

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About the Presenter

Walter J. Sperko is president of Sperko Engineering Services, Inc. in Greensboro, N.C.  The firm provides engineering consulting services to customers in the metal fabrication industries in welding, metallurgy, manufacturing processes, piping and pressure vessel design, inspection and quality assurance. The firm also prepares and conducts training programs in ASME Section IX, piping, welding and metallurgy, as well as custom-tailored programs related to metal fabrication. Prior to his consulting business, Sperko was with RECO North Carolina, Inc. (Colfax, N.C.), ITT Grinnell Industrial Piping, Inc. (Kernersville, N.C.) and Ebasco Services, Inc. (New York, N.Y.).

Report Shows MCAA Members Don’t Invest Enough in Tech Budget and Manpower

In 2018, MCAA sponsored a JBKnowledge Construction Technology Report that surveyed over 2,800 professionals in the construction industry. In the newly released MCAA-Focused Report, the responses given by MCAA members were separated and compared to those of the rest of the construction industry.

While MCAA members are getting heavily involved in VDC and mobile technology, they are behind the rest of the industry when it comes to some aspects of R&D. As the report’s primary researcher, Liz Beechinor from JBKnowledge points out, “Our research is showing that the construction industry as a whole is behind on R&D spending compared to other industries, but when we take a look at MCAA members’ responses and compare that to the construction industry, they are even further behind. Fewer MCAA contractors have dedicated R&D budget and employees dedicated to R&D.”

According to a 2017 McKinsey Report, the construction industry as a whole spends less than 1% of their revenue on R&D. Compared to the auto industry, which spends 3.5%, and the aerospace industry, which spends 4.5%, this can seem relatively underfunded.

What is even more concerning is construction companies’ lack of any R&D budget. The 2018 MCAA-Focused Construction Technology Report showed that 56.8% of those surveyed had no budget for R&D, while 63.5% of MCAA members reported that they didn’t budget for R&D.

The same could be said for having employees dedicated to R&D. In the last few years, we have seen more MCAA and MSCA contractors dedicate manpower to technology research and implementation, but on average, they are still behind the rest of the industry.

Most respondents that identified as MCAA members reported that they had one or two people dedicated to R&D, while 37% do not have employees dedicated to R&D. During a presentation on the topic at MCAA19, MCAA’s Director, Construction Technology Sean McGuire explained, “While we are seeing more members take technology seriously, smaller companies are going to always be more limited on budget and manpower that they can dedicate towards research and implementation. Larger GCs and CMs can absorb these costs a little easier simply as a function of their size.”

Being bigger does not necessarily mean better though.  As Sean notes, “While research and staff budgets can be absorbed by larger companies easier, the bigger you are, the harder implementation becomes. Small companies can adopt changes a lot faster because you can get less people pulling in the same direction faster.  Large companies have to dedicate more resources to implementation and follow up.”

This lines up with another report question that asked what the most limiting factor was for adopting new technology. Not surprisingly, lack of staff and budget received the highest response rates and were concerns for nearly half of the MCAA respondents. The report provides further insight into these questions as well as BIM productivity and estimation and mobile device and hardware use.

Soldering Lead-Free Valves Takes Added Practice

Plumbing manufacturers have made great efforts to remove as much lead as possible to comply with regulations established under the Safe Drinking Water Act. In order to meet these requirements, most manufacturers have used brass alloys containing small amounts of silicon or bismuth to improve machability. In the following years, most plumbers learned how to effectively make joints with the new alloys, but sometimes it is not apparent how complete the fill is in joints unless they are tested.

A recently released NCPWB technical bulletin demonstrated how joints that appear to be correctly soldered could often be frayed. The bulletin’s author, Walt Sperko, provided examples of incorrect joints and guidance. Pre-heating the tube more than the casting is critical for no lead copper alloys. This is because casting’s thermal conductivity is much lower than copper.

Incomplete fill from under-heating

When the plumber does not spend enough time on heating the tube, the solder has a tendency to only partially fill the joint. While silicon-based alloys were found to be more difficult to wet properly, both proved insufficient with poor technique.

NCPWB members can also download the Soldering Procedure Specification resource SPS-107-1 to better understand the welding procedures for brass and lead-free alloys.

Soldering Lead-Free Valves? Beware!

Are you planning to solder in a couple of dozen 1-1/2 inch brass control valves in that heating system you are installing in that high-rise building? Brass valves, of course, are castings and all the castings you buy today are lead-free. Does your journeyman who can solder a wrought 1-1/2 inch copper coupling with ease make the same quality joint when one side is a heavy-wall cast valve body? How about if the castings you bought are alloyed with silicon for machinability improvement rather than with bismuth?

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Team Industries Decreases Training Time, Increases Efficiency with Miller PipeWorx Welding System

Since they started using the Miller® PipeWorx 400 welding system, Team Industries has reduced rework—saving time and money—because of the system’s ease of use and consistent arc quality. “We have seen a decrease in X-ray failure. The consistency of the arc definitely plays a role in that,” said Jim VanZeeland, shop superintendent. “It’s just been a great machine for us.”

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Looking for More Ideas to Help You Save Time and Money?

Visit the Smart Solutions Case Studies area of our website to see how other mechanical contractors found their win-win with cost-saving and productivity-enhancing applications from members of MCAA’s Manufacturer/Supplier Council.

This section of our website also features tips and ideas on other ways you and your company can save money and enhance your productivity.

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NCPWB Technical Bulletin Focuses on Failures in Seamless Carbon Steel Pipe, Fittings, Flanges

A Technical Bulletin just issued by the National Certified Pipe Welding Bureau (NCPWB) concerns failures in seamless carbon steel pipe, fittings and flanges during hydrostatic testing due to changes in steelmaking practices by certain mills over the last five years. The Bulletin recommends that, except when the piping system hydrostatic test pressure is less than 20% of the code maximum allowable pressure, contractors should include a requirement in their purchase orders that seamless carbon steel pipe, fittings and flanges have a manganese-to-carbon ratio of 5:1 or greater and a grain size of 7 or finer to avoid such failures. Find out more by clicking on the link below.

NCPWB Technical Bulletin