1. Manufactured in accordance with? (BS 5351, API
6D,MSS-SP-72) what ever is applicable.
2. Applicable codes and standards (I don’t know what
size or material else process in question in
addition face-to-face dimensions to be employed)
a. API 6FA,598,605,607 ?
b. ASME B16.5,16.10,16.24,16.34,16.47 ?
c. BS 1560,2080,2872,5351,6755?
d. MSS-SP-44,72?
e. NACE-MR0175?
f. ASTM’s
3. Materials (I don’t know what kind of service you
have in mind)
a. Body/Bonnet
b. Ball
c. Trunnion
d. Body Seat Ring
e. Steam Seal
f. Spring
g. Body studs/nuts
4. Design
a. Split body, fully body, top entry, side
entry, full/reduced bore?
b. Trunnion mounted or floating type
c. End connections (SW/THRD/Flanged RF/RTJ ?)
d. Drain connection
e. Body Seat ring renewable? Welded?
f. Secondary sealing arrangement?(I dont know
the size or service)
g. Arrangement B&B bleeding connection fitted
where?
h. Control of cavity pressure (upstream
venting/self relieving seat)
i. Sealing of stem?
j. Soft seats (antistatic devices, BS5351)
5. Operation
a. Lever/wrench?
b. Actuators?
6. Inspection
a. Hardness readings
b. Hydrostatic/Pneumatic testing
c. ENP application if applicable
d. NDE’s (PT-RTG, MPI-Body PT for non-magnetic
bodies)
e. Volumetric examination (RT-ASTM E94/142)
100% of butt welds. Acceptance criterion
ASME Sect. VIII, Div.1 or ASME B16.34
Annex. B or C I forgot; please check.
Much or less I presume, hope it helps

btw I'm not good in valves. Talk to CHDO1
regs