Experts
I recently inspected a SA 106 pipe for my project and I faced the following problem.
Statement in our client specification for sour service: "Material shall meet the requirements of Nace MR0175/ISO15156". No specific statements regarding HIC/SSC test.
Statement in the Material test...
Dear Experts
I am new to the world of coating inspection. If I do excessive blasting on a surface which already having a profile of 60 micron(for example), what will be the consequences apart from excess abrasive consumption.Plz guide me
Regards
Rajj
Moseley
Thank you very much. As per your explanation above "If you are planning on welding without filler metal (Autogenously) then 323.2.2(f) will exempt you from Impact testing", my weldment will be exempted from impact testing. My base metal will be exempted only if my carbon is within the...
Sekar
Some clients are not directly specifying about corrosive service. In turn they are insisting to have some corrosion allowance during thickness calculation. Such equipment's have to be provided with inspection openings as per UG-46.
Dear Experts
Please review the 2 code clauses which I referred below from ASME B31.3, 2014 Ed.
Clause 1:As per table 323.2.2 box A-4(a)-- if (1) Carbon > 0.1%; or (2) the material is not solution treated; then impact test has be carried out at design min.temp less than -29 degreeC except as...
Metengr
Thank you very much for your reply."A blast furnace produces hot metal, which is refined into steel and would fall under basic oxygen"-this is what I am looking for. Further tc stands for test certificate.Guess I confused you bit.
Tman1
You can find SA-20 in ASME Sec II Part-A
Cheers
Rajj
Weldstan
My concern is over the type of furnace employed. not about grain practice.
Metengr
I am not from metallurgical background. It will be more helpful,If you can explain the basis of acceptance.Also from the manufacturer website, I understood that they are using blast furnace for melting...
Dear experts
We procured a plate material (sa 516) and its test certificate from a reputed german manufacturer. As per 5.1 of sa 20, the steel shall be made in open hearth, basic oxygen or electric arc furnace. But in the tc, they didnt specify exactly the type of furnace. They stated only...
DekDee,
Thanks for sharing your experience.
Al,
Thank you very much for your explanation.So informative. we added UT in our corrective action and client accepted our proposal.
Cheers
Rajj
Metengr
Thanks for your valuable advice.
Dekdee
Just for the case, let me assume you are my client. My proposal for this NCR is "Carrying out 100% LPT on the defected weld metal+HAZ before and after PWHT in presence of client to assure the conformity of weld. If any linear indication(crack)...
Guys, We are fabricating a carbon steel vessel of 38mm thickness(shell). As per WPS, the base metal has to be preheated to 100C minimum. Unfortunately the external pad to Shell welding has been carried without Preheating. This is the Non conformance. What is the recommended resolution for this...
Its of 2nd type. The name of the equipment is Reaction furnace steam generator and it is a part of Reaction furnace WHB package.The inlet is from combustion chamber and the outlet is connected to steam drum. Since I am fabricating only steam generator, i don't have much information about other...
chicopee, it is a steam generator for waste heat boiler.As stated by Mike,their concern is to eliminate the crevice between tube & tubesheet. I will come up with other details soon.
Chicopee,Its not the projection. They insist to expand the tube beyond the backside of tubesheet thickness. So the length of expansion will be the sum of tube projection+ Tubesheet thickness + 1/8inch. Hope I am clear.
We are fabricating a steam generator for WHB.In client spec for tube expansion, they specified to expand 1/8inch beyond the tubesheet thickness (to the backside of the tubesheet). The tubes are to be strength welded and expanded to 3-8%. We used to expand as per TEMA i.e.tubesheet thickness...
Hi Guys,
I am new to this field. Can anybody explain what is the intention of Fire safe test for mechanical valves?.Whats the purpose of this test.API 607 states the method of doing but I am unable to find why to do?
Thanks
Rajj
gr2vessels,
I sent a query mail to my supplier earlier.I m awaiting for his reply. Anyway whats code requirement over this.Whether Section VIII insisting to use sightglass during hydro or not?. what is the normal practice?
Hi guys,
Is it advisable to do hydrotest of a newly constructed pressure vessel with sightglass on. My hesitation is, the purchase requirement of sightglass states only design temperature and pressure of a vessel which is less than the hydrotest pressure.There is some pressure value stated on...
Mr.Xtrac,
Thanks for understanding..we also follow the same method as u said. But one of our client inspector suggesting the following sequence. Place pad with nozzle fitup.Filling the groove between nozzle&pad.As per him, now the rootface of pad is completely get melted and shell rface is...
Hi guys,
Recently I come across one vessel Inspector who confused me bit over RF pad welds. In my case, shell thickness is 20mm with inside single bevel (root face 1mm)& external RF pad thickness is 20 mm (root face 1mm). RF pad & shell together forms double bevel geometry with root face of 2mm...
