I was wondering whether I could use 316 in lieu of 304 for low temp applications down to -196 C? I am trying to ban all 304 from our site for pitting resistance reasons but have been told we need 304 to achieve the required properties down at these temps. As far as I am aware 316 would be equal...
I don't have cryo experience and was wondering whether I could use 316 in lieu of 304 for low temp applications down to -196 C? I am trying to ban all 304 from our site for pitting resistance reasons but have been told we need 304 to achieve the required properties down at these temps. As far as...
I have had some s/s balustrading installed at home which has already started "tea staining" after just a couple of months. We are at least 10 km away from the coast, and hence insisted on using 316 s/s instead of 304. I am convinced that the fabricator has used 304 for some sections of the...
Is it correct to say that with TMCP steels being rolled at various temperatures and in various directions(???) - that rolling direction is no longer an issue for cold forming of a TMCP plate?
A contractor has approved a procedure using 309 SS to weld a A36 support shoe to the re-pad on S31803 DSS piping (repad is of the same piping material).
We normally specify a DSS filler for welding DSS to CS.
We are thinking that 309, being a high alloy austenitic stainless in dilution with...
I am reveiwing a contractor WPS for cladding F65 forging materials with 625 CRA in two layers up to 5 mm thick. Base material qualified is for 25.4 mm upwards. I note that the procedure is qualified with PWHT at 600 to 630 Celcius at one hour per inch - max 3.3 hours.
I am uncomfortable with...
Our contractor, has passed on the following response from the flare manufacturers/designers.
There is some H2S in the LP & tank farm flare streams (0.01 and 0.04 mol% respectively) which the vendor indicates will be a problem for the nickel alloys (800, 625) and as such they propose 310/316 for...
We are procuring line pipe and bends out of Japan. Material is Dnv-OS-F101 Grade 450 (X 65 equivalent), seamless 4" diameter x 7.4 mm wall thickness. The line pipe undergoes a Q & T during manufacture. The mother pipe that is then used for induction bending may or may not be put through post...
I am wanting to make up a funnel using a duplex 31803 reducer welded to a 90/10 Cunifer fitting, hence no pressure or corrosion issues to worry about, I just need to be able to join them together. (I am offshore and have limited access to materials).
I am think of using Inconel 625 as a filler...
I am needing to clean and passivate some significant quantities of 316 s/s on an offshore platform in the Timor Sea. The usual HF and HNO3 based pickling pastes are considered too hazardous and environmentally unfriendly to use and wash overboard. I believe there may be a citric based product...
We are needing to weld three to four topsides riser joints from X-65 line pipe, using FCAW-GS process (tig root). FCAW-GS consumable is lincoln 81-K2-H. Pipe size is DN700 x 39 mm wall thickness. Code is B31.8 which generally refers you back to API 1104.
At this thickness we need to PWHT. We...
Can any body please tell me if there is any difference between the these and if so, has one superceded the other with regards material certification?
ISO 10474 Vs EN 10204
Regards
Nick T.
Australia
I would like to know why many specs call for not using cad plated bolting in applications above 200 degrees C. Is it an HSE issue or a coating integrity issue? I am referring to A320 L7 bolts.
