| Subject/Item |
Design and Material Requirement |
Material |
MDS |
EDS |
| BODY/BONNET |
Top entry or split body, bolted |
A890 J93404 A182 S32750 |
D56 D54 |
|
| INSIDE TRIM |
Metal to metal sealing. No contact or sliding action between seat and ball during rotation of ball. Sealing by mechanically imposed thrust. No elastomers |
|
|
|
| PORT |
Full bore |
|
|
|
| STEM |
|
A182 S32750 |
D54 |
|
| CLOSURE MEMBER |
Trunnion mounted ball (solid); For sizes 6" and below, use material type 316 SS or Nickel alloy 625, both with hardfacing |
A182 S32750 |
D54 |
NHF1 |
| SEATS |
Seat ring; For sizes 6" and below, use material type 316 SS or Nickel alloy 625, both with hardfacing |
A182 S32750 |
D54 |
NHF1 |
| SPRINGS |
|
|
|
|
| SEALS |
Packed gland (expanded graphite) or lip seal design and fire seal |
|
|
|
| LIP SEAL |
Material according to EDS |
|
|
NSM1 |
| O-RING |
|
|
|
|
| FIRE SEAL |
Expanded graphite not less than 98% purity |
|
|
|
| OUTSIDE TRIM |
|
|
|
|
| BOLTING |
Material according to EDS |
|
|
NBO2 |
| SPECIAL REQUIREMENTS |
Wetted parts suitable for sour service to NACE MR0175 |
|
|
|