ASTM coding for fasteners

[SuperSnailRSA]

Hi Everyone,

I'm looking for some guidance/ advice with regards to ASTM coding on U-bolts...

I Submitted a piping BOQ for procurement and specified my U- bolts as follows

< M10, TO SUIT 80NB PIPE, COMPLETE WITH 2 HEX NUTS AND 2 LARGE FLAT WASHERS - U-BOLT TO SANS 1700, ASTM SA193 - SS304L A2 ,
HEX NUT & LARGE FLAT WASHERS SS316L A4 >

Our procurement department almost had a nuclear meltdown because the supplier came back saying that the ASTM A193 specifies its a machined U-Bolt? it the first time I have heard that a ASTM code is indicative on the manufacturing process for a fastener/U-bolt? is ASTM A193 the correct code to call up for a stainless 304 U-bolt is my description event correct? ? its not serving any special purpose or critical component... it is literally holding a Stainless 304 pipe to the pipe support on a pump skid that handles flocculant make-up and dosing to a cobalt thickener. I know A193 is for high temp but its what I have always specified before with no comebacks. now its a borderline extinction level event because everyone is now confused...

The design application for this pipe is

Design pressure - 1000 kPag
service rating - 720 kPag
Design temp - 40 Deg C
Commodity - Flocculant solution made up with raw water
Design location - Northern Congo
Special design criteria - Acidic environment SS304 is required due to corrosion

Thank you

 

[1503-44]

It sounds like it is for a structural bolt application, but you have used the typical pipe flange stud bolt material, alloy, or stainless, spec A193. That is used for U bolts, but ... somebody says no, so

If you can keep the acid away from them, you might try A307, which is plain carbon steel, typical for structural (anchor) bolts made from a less expensive, common A36 steel. If they will be exposed to acid, go back to a stainless spec.