Skip to main content

Re: [MW:32090] Hydro test as per ASME B31.3

By Materials & Welding

Dear Mohamed Suhail

,





In such cases you can ask for approval from the client for doing Hydrotest after backfilling. 

You can approach them with the risk involved in doing so and if anything goes wrong it's your company's responsibility to make it correct without extra money.

For Testing you can add a Chart recorder or increase the duration of testing for client satisfaction.

Thanks and Regards,

Bishwambhar Kumar
Ph:- +974-55311582




On Wed, 24 Mar 2021 at 06:18, Mohamed Suhail <mohamedsuhailc@gmail.com> wrote:
Dears,

My company having a job in 2-month schedule and it is having 40% underground piping.
As per ASME B31.3, these piping shall be hydro tested before painting & backfilling as per 345.3.1
But as per the weather condition here, the rain will start by next month and it will affect the schedule. We have to backfill before the rainy season and we cannot complete the connecting above ground piping job before the rain. We are planning to do hydro test after complete all AG & UG welding.
So is there any possibility to change the hydro test after backfilling same as B 31.4/ API 1104.
Please give the positive reply, as I know there are many negative answers to this issue.


Regards,

Mohamed Suhail.


--
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 on the web visit https://groups.google.com/d/msgid/materials-welding/CAJeBvRuvNxBFO990oxQ%2B_bKmEqL-PJMzbDbOi0aSuE7vj4Zk2w%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 on the web visit https://groups.google.com/d/msgid/materials-welding/CANraJ5miugrwq%2BN6UgLH5xvVLFOx-w%3DbnE1w4DaeOnS2wEBUdg%40mail.gmail.com.

Comments

Post a Comment

Popular posts from this blog

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

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

The Schaeffler and Delong diagrams for predicting ferrite levels in austenitic stainless steel welds

By Materials & Welding
Introduction Ferrite is important in avoiding hot cracking in during cooling from welding of austenitic stainless steels. 'Constitution diagrams' are used to predict ferrite levels from the composition by comparing the effects of austenite and ferrite stabilising elements. The Schaeffler and Delong diagrams are the original methods of predicting the phase balances in austenitic stainless steel welds. Nickel and chromium equivalents A 'nickel equivalent' is calculated for the austenite stabilising elements and a 'chromium equivalent' ferrite stabilising elements. These are used as the axes for the diagrams, which show the compositional equivalent areas where the phases austenite, ferrite, martensite (and mixtures of these) should be present. Although intended to show the phase balance of weld fillers, these diagrams can also be used to illustrate the phase balance of the 'parent' material. There are different diagrams for dif...
Post a Comment
Read more