| MATERIAL CLASS1 |
SERVICE CONDITION DESCRIPTION |
FORGING BODY MATERIAL2 |
TEMPERATURE3 |
CASTING BODY MATERIAL2 |
TEMPERATURE3 |
BONNET2 |
BONNET SEAL RING |
GATE4 |
STEM5 |
SEAT4 |
STEM SEAL |
STEM SEAL |
| AA |
Non-sour service |
GENERAL SERVICE STANDARD TRIM NON-CORROSIVE |
API 60K/75K AISI 4130 ALLOY STEEL |
API TEMP L-Y |
API 60K ASTM A487-4C ALLOY STEEL |
API TEMP L-Y |
API 60K OR 75K AISI 4130 ALLOY STEEL |
AISI 1018/1020 LOW CARBON STEEL |
API 60K OR 75K AISI 4130 NITRIDED |
API 60K OR 75K AISI 4130 NITRIDED |
API 60K OR 75K AISI 4130 NITRIDED |
PTFE+NBR GRAPHITE PEEK |
PTFE+NBR |
| BB |
GENERAL SERVICE STAINLESS TRIM SLIGHTLY CORROSIVE |
API 60K/75K AISI 4130 ALLOY STEEL |
API TEMP L-Y |
API 60K ASTM A487-4C ALLOY STEEL |
API TEMP L-Y |
API 60K OR 75K?AISI 4130 ALLOY STEEL |
AISI 304 OR 316 STAINLESS STEEL |
AISI 410 STAINLESS STEEL NITRIDED |
ASTM A564 630(17-4PH) STAINLESS STEEL AISI 410 NITRIDED |
AISI 410 STAINLESS STEEL NITRIDED |
PTFE+FKM GRAPHITE PEEK |
PTFE+FKM |
| CC |
GENERAL SERVICE FULL STAINLESS MODERATELY CORROSIVE |
API 75K AISI 410 STAINLESS STEEL |
API TEMP L-Y |
API 75K ASTM A217 CA-15 STAINLESS STEEL |
API TEMP L-Y |
API 75K AISI 410 ALLOY STEEL |
AISI 304 OR 316 STAINLESS STEEL |
AISI 410 STAINLESS STEEL NITRIDED |
ASTW A564 630(17-4PH) STAINLESS STEEL AISI 410 NITRIDED |
AISI 410 STAINLESS STEEL NITRIDED |
PTFE+FKM GRAPHITE PEEK |
PTFE+FKM |
| DD-NL |
SOUR SERVICE |
SOUR SERVICE STANDARD TRIM NON-CORROSIVE |
API 60K/75K AISI 4130 ALLOY STEEL |
API TEMP L-Y |
API 60K ASTM A487-4C ALLOY STEEL |
API TEMP L-Y |
API 60K OR 75K AISI 4130 ALLOY STEEL |
AISI 304 OR 316 STAINLESS STEEL |
API 60K OR 75K AISI 4130 NITRIDED |
API 60K OR 75K AISI 4130 NITRIDED |
API 60K OR 75K AISI 4130 NITRIDED |
PTFE+FKM GRAPHITE PEEK |
PTFE+FKM |
| EE-0.5 |
SOUR SERVICE STAINLESS TRIM MODERATELY CORROSIVE |
API 60K/75K AISI 4130 ALLOY STEEL |
API TEMP L-Y |
API 60K ASTM A487-4C ALLOY STEEL |
API TEMP L-Y |
API 60K OR 75K AISI 4130 ALLOY STEEL |
AISI 304 OR 316 STAINLESS STEEL |
AISI 410 STAINLESS STEEL NITRIDED |
ASTW A564 630(17-4PH) STAINLESS STEEL AISI 410 NITRIDED |
AISI 410 STAINLESS STEEL NITRIDED |
PTFE+FKM GRAPHITE PEEK |
PTFE+FKM |
| EE-1.5 |
SOUR SERVICE STAINLESS TRIM MODERATELY CORROSIVE |
API 60K/75K AISI 4130 ALLOY STEEL |
API TEMP L-Y |
API 60K ASTM A487-4C ALLOY STEEL |
API TEMP L-Y |
API 60K OR 75K AISI 4130 ALLOY STEEL |
AISI 304 OR 316 STAINLESS STEEL |
AISI 410 STAINLESS STEEL NITRIDED |
INCONEL 718/625 |
AISI 410 STAINLESS STEEL NITRIDED |
PTFE+FKM GRAPHITE PEEK |
PTFE+FKM |
| EE-NL |
SOUR SERVICE STAINLESS TRIM MODERATELY CORROSIVE |
API 60K/75K AISI 4130 ALLOY STEEL |
API TEMP L-Y |
API 60K ASTM A487-4C ALLOY STEEL |
API TEMP L-Y |
API 60K OR 75K AISI 4130 ALLOY STEEL |
AISI 304 OR 316 STAINLESS STEEL |
AISI 410 STAINLESS STEEL NITRIDED |
INCONEL 718/625 |
AISI 410 STAINLESS STEEL NITRIDED |
PTFE+FKM GRAPHITE PEEK |
PTFE+FKM |
| FF-0.5 |
SOUR SERVICE FULL STAINLESS HIGHLY CORROSIVE |
API 75K AISI 410 STAINLESS STEEL |
API TEMP L-Y |
API 75K ASTM A217 CA-15 STAINLESS STEEL |
API TEMP L-Y |
API 75K AISI 410 ALLOY STEEL |
AISI 304 OR 316 STAINLESS STEEL |
AISI 410 STAINLESS STEEL NITRIDED |
ASTM A564 630(17_4PH) STAINLESS STEEL NITRIDED |
AISI 410 STAINLESS STEEL NITRIDED |
PTFE+HNBR GRAPHITE PEEK |
PTFE+HNBR |
| FF-1. 5 |
SOUR SERVICE FULL STAINLESS HIGHLY CORROSIVE |
API 75K AISI 410 STAINLESS STEEL |
API TEMP L-Y |
API 75K ASTM A217 CA-15 STAINLESS STEEL |
API TEMP L-Y |
API 75K AISI 410 ALLOY STEEL |
AISI 304 OR 316 STAINLESS STEEL |
AISI 410 STAINLESS STEEL NITRIDED |
Inconel 718/625 |
AISI 410 STAINLESS STEEL NITRIDED |
PTFE+HNBR GRAPHITE PEEK |
PTFE+HNBR |
| FF-NL |
SOUR SERVICE FULL STAINLESS HIGHLY CORROSIVE |
API 75K AISI 410 STAINLESS STEEL |
API TEMP L-Y |
API 75K ASTM A217 CA-15 STAINLESS STEEL |
API TEMP L-Y |
API 75K AISI 410 ALLOY STEEL |
AISI 304 OR 316 STAINLESS STEEL |
AISI 410 STAINLESS STEEL NITRIDED |
Inconel 718/625 |
AISI 410 STAINLESS STEEL NITRIDED |
PTFE+HNBR GRAPHITE PEEK |
PTFE+HNBR |
| HH |
SOUR SERVICE RESISTANT ALLOY HIGHLY CORROSIVE |
API 75K AISI 4130 ALLOY STEEL W/625 CLADED |
API TEMP L-Y |
|
|
API 75K AISI 4130 ALLOY STEEL W625 CLADED |
Inconel 825 RESISTANT ALLOY PER NACE |
Inconel 718/625 W/HARD FACING |
Inconel 718/625 |
Inconel 718/625 W/HARD FACING |
PTFE+HNBR GRAPHITE PEEK |
PTFE+HNBR |
Note
1. Materials for sour service to latest edition of NACE MR0175.Alternate materials are oval lable for special material classes designated by API or project requirements.
Explanation of suffixes for material classes DD, EE and FF:
0.5=0.5 psia maximum partial pressure of H2S.
1.51.5 psia maximum partial pressure of H2S.
NL= no limit to H2S.
2. Charpy Impact test results provided as required by API temperature rating and material class.
3. API temperature ratings X and Y require working pressure of valve to be de-rated as per AN CIA annex G.
4. Nitriding is standard on all gates and seat. Hardfacing with tungsten carbide or Hf6 also available upon request.
5. ASTM A564 Gr. 630(17-4 ph) Hh 1150 stems are not acceptable for sour service above 0.5 psia of H2S.corrosion resistant alloys per NACE MR0175/ISO standards are recommended.
6. Teflon Insers standard-metal to metal seats used if requested for equipment manufactured for use In elevated temperature service API temp ratings X&Y. |
