Skip to main content

Re: [MW:35883] welder certification

By Materials & Welding
Heloo Mr Rilley,
I hope your WPS qualifies as per ISO 15614-1 . Can you clarify if your category is Level1 or Level 2? What about Pipe OD?

No, as per ISO 15614-1, a Welding Procedure Specification (WPS) qualified on S355jr plate with 30mm thickness using SMAW does not qualify you to weld S355jr pipe with 6mm thickness using the same WPS. The essential thickness qualification range for butt welds is based on the thickness of the test piece and differs for plate and pipe, especially when moving from plate to significantly thinner pipe.

Plate-to-Pipe Qualification Limits

  • Plate test pieces generally only qualify pipe if the pipe's outside diameter is greater than 500mm, or if the diameter is more than 150mm and welded in the PA or PC (rotated) position. For smaller pipe diameters or significantly lower wall thickness, separate qualification is required.

  • In your specific case (30mm plate → 6mm pipe SMAW, S355jr), you cannot directly use the WPS without further qualification of the pipe if the diameter limitations above are not met.


 Pls find the attached Code extract for your reference.

Thanks & Regards,
Balamurugan

On Thu, Nov 6, 2025 at 9:17 PM Rilley Chellah Mulenga <rilley.mulenga@ahkgroup.com> wrote:
Good day technical experts,

Can I use a WPS for S355jr thickness of 30mm plate in SMAW to qualify a pipe S355jr 6mm thick in SMAW ? your quick response is highly appreciated  

--
RILLEY CHELLAH MULENGA
Materials Evaluation Head of Department
E: rilley.mulenga@ahkgroup.com
CompanyLogo
 


DISCLAIMER: The information in this Internet e-mail is confidential and may be legally privileged. It is intended solely for the addressee(s).
Access to this Internet e-mail by anyone else is unauthorised.

If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful.
All results and data contained in this document are subject to our Standard Terms and Conditions and are valid only when supported by an original document.

Please visit our website at www.ahkgroup.com

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAHkXHT84wQHJDjOio6eAbwpnQX6Zu29uhEkGAtv-jXvEPCTArA%40mail.gmail.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/materials-welding/CAL9C6DZUTB9WQmppTgkszDHBd-2Wi5Lk6dx1xeM4-nXcU68D7w%40mail.gmail.com.

Comments

Post a Comment

Popular posts from this blog

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more

Re: [MW:10788] ON PLOT PIPING & OFF PLOT PIPING

By Materials & Welding
Piping systems involved for the flow lines and gathering lines from the well head isolation valve to the production facility or processing plant isolation valve are determined as OFF PLOT. ON PLOT defines piping system in the processing plant and production platform. ANSI/ASME B31.4 applies for off plot piping system. B31.4 allows the use of either API 1104 or ASME section IX (as appropriate). However, occasionally, a very small system such as piping within 500 feet of a processing plant (some client also said 400 feet) may be declared B31.3 rather than B31.4. When B31.3 is invoked, only ASME Section IX is used. before you decide which code to use for welding procedure and/or welder qualification for pipe welding, you have to know the design and construction code applicable to the system. Please read far enough into scope and diagram illustrating the application of either B31.3 and B31.4 hope this helps rgds 2011/4/21 pradip kumar sil < pradipsil@gmail.com > Dear all, ...
Post a Comment
Read more