No body-bonnet gaskets are left to the manufacture. sometimes it might be coincidence one lines up with a standard size but in general they are custom per manufacture.
This is fairly common on small gate valves typically 1" and below sizes flanged/buttweld ends because machining the seating area can be difficult without inclining the waterway due to long end to end if you order same valve with SW or THD ends you likely won't see this . By 2" size typically...
Trim 10 is 316 stainless on both seat surfaces and 316 stem
Trim 12 is 316 stem, one seat surface 316 and one seat stellite #6 (hard faced)
Neither trim allows 304 stainless.
Typically people want the "upgrade" to trim 12 due to wear concerns and wanting to avoid galling by having dissimilar...
Markings detailed in sections 4.1, 4.2, 4.3 and 4.4 (all of Section 4) are all required to be in compliance with B16.34. Many of these markings are already required by other standards like MSS SP 25 and the ASTM material specs.
PT and MT (liquid penetrate and Magnetic particle testing) are surface examinations. Either one can be used to find surface defects on the part being tested. MT must be used on a part that is magnetic so it won't work on most stainless and most corrosion resistant alloys.
RT and UT are volume...
On larger gate valves forged stems are common because you can forge the T-head shape and save some money on materials not having to turn down a huge diameter.
API 600 says a "Typical material" is A276 Type 316 not "recommended material". So using A182 F316 is acceptable.
The only advantage I see of using 316L over 316 would be if you are welding on it. It's unlikely anybody will be welding something to the valve stem. Don't know what type of valve we are discussing but most valves don't have much reason to be welding on the valve stem. If was a valve body then...
My best guess would be "Average Wall Thickness" however the numbers in front of them are extremely large for wall thickness values if in mm units. Is it possible it's "7.9 AWT" and "9.8 AWT"?
ISO 15848 Is specifically written around testing the fugitive emissions from a valve. It has specific test parameters, and acceptance criteria.
ASME section V article 10 is a much more generic set of rules if you do leak testing on something could be anything and does not appear to have any...
couple things here:
1. Both API 600 and API 603 are gate valve standards. technically a globe valve will never meet either standard. That said what most people quote is globe valves that meet the applicable parts of API 603 and 600
2.For the most part API 603 and API 600 are similar however...
B16.34 does have a recommended port dia chart in non-mandatory appendix A. Pressure seal port diameters will vary vendor to vendor. Nothing really defines what "full port" means for most pressure seal valves. The B16.34 ports are not mandatory but many consider those as a full port guideline...
3.2 requires a third party inspection from either designated by the client (your customer)
By what I read you did the 3rd party inspection on your own which doesn't meet 3.2. So what you can try and do is get your client to approve the 3rd party inspection already done and then you will be able...
