Re: [MW:31477] Water Requirements for Hydrotest

Dear ,

As follow saudi aramco standard and procedure , saes-a-004, saes-l-150, following are my observations

Water used for hydro testing of stainless steel piping systems shall have chloride content value less than 50ppm, and PH value should be 7.5, ±.5.

Water used for any part of the hydro testing or subsequent lay-up shall have a sulfate reducing bacteria (SRB) count of 10³ per ml or less

When the equipment contact time with hydrotest water may exceed 14 days, an approved oxygen scavenger shall be added to the hydrostatic test water.

For stainless-steel piping, the duration of the hydro testing (using water with less than 50 ppm of chlorides), flushing and draining-drying sequence shall be kept as short as possible, in order to reduce the possibility of chloride attack. Water testing certificate will be made available for each hydro test

regards

Dhaneesh

On Fri, Sep 18, 2020 at 5:48 PM Manish Kumar <mkmkr431@gmail.com> wrote:

Sir,
How much Ph value is required for Hydrotest in Stainless steel piping and equipment.Please advise as per reference of relevant standard & Code.

On Fri 18 Sep, 2020, 5:38 PM Vishwas Keskar, <vvkeskar123@gmail.com> wrote:
use water with Chloride content less than
25 ppm
use potable water
do water analysis

On Fri, 18 Sep 2020, 15:38 Manish Kumar, <mkmkr431@gmail.com> wrote:
Dear Sir,
I want to know that which type of water is used for Hydrotest in stainless steel piping and equipment. Please advise as per relevant code and standard.

--
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/CAHfQ4k7ZV%2B%3DrkXu%3DSdnx2zeGsMf83xjjA%2B4-CLvDzZ1TBuuBfg%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/CADder3P9%2Bfx%3DaawdsnsTePqFj7W09SMCfy5-tLnkfZ8OS1wHMw%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/CAHfQ4k6B4ZuqjvGU7OpupRWFSxN55f3uP4Tw4DssquqyoVUKxw%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/CAHZhELcmHCbdtCsGOkHKh0DiNXtvag%2B5sArsT7BwB7JGMpREVA%40mail.gmail.com.

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

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...

Materails FAQs

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...

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

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...

Materials & Welding

Search This Blog