Gate Valve Trim Chart

SERVICE CONDITIONS Trim Body Bonnet Gate Seat Sten BSR
General / Non Corrosive AA A487 4D/4130 4130 4130 4130 4130 1018
General / Slightly Corrosive BB A487 4D/4130 4130 410SS 410SS 17-4SS 316SS
General, Moderately Corrosive, CO2 CC CA6NM / 410SS 410SS 410SS 410SS 17-4SS 316SS
Sour, Non-Corrosive DD-NL A487 4D/4130 4130 4130 4130 4130 1018 ZINC
Sour, Non-Corrosive DD-0,5 A487 4D/4130 4130 4130 4130 17-4SS 1018 ZINC
Sour, Slightly Corrosive EE-0,5 A487 4D/4130 4130 410SS 410SS 17-4SS 316SS
Sour Highly Corrosive, MOD Abrasive, CO2 EE-1,5 A487 4D/4130 4130 410SS 410SS 410SS 316SS
Sour Highly Corrosive, CO2, High Abrasive EE-NL A487 4D/4130 4130 410SS 410SS NITRONIC 50*1 316SS
Sour, Moderately Corrosive, H2S FF-0,5 CA6NM / 410SS 410SS 410SS 410SS 17-4SS 316SS
Sour, Highly Corrosive, CO2 and H2S FF-1,5 CA6NM / 410SS 410SS 410SS 410SS 410SS 316SS
Sour, Highly Corrosive, CO2 and H2S FF-NL CA6NM / 410SS 410SS 410SS 410SS NITRONIC 50*1 316SS
High Corrosion Extreme Service HH-NL *3 4130 w/625 Inlay 4130 w/625 Inlay INCONEL 718 *2 INCONEL 718 *2 INCONEL 718 *2 316SS

NOTES:

  1. INCONEL 718 IS AVAILABLE AS AN UPGRADE.
  2. INCONEL 718 IS ONLY “NL” FOR TEMPERATURES K THRU U. INCONEL 725 CAN BE USED UP TO TEMP X.
  3. CRA MATERIAL IS NOT AVAILABLE FOR TEMP Y SERVICE.
  4. STANDARD TRIM PARTS ARE QPQ NITRIDED.
  5. TUNGSTEN CARBIDE, HVOF, HARDFACED GATES AND SEATS ARE AVAILABLE FOR ANY TRIM UPON REQUEST.
TRIM CODE API SPEC.6A RETAINED FLUID RATING MATERIAL CLASS EXPLANATION
T-21 AA STANDARD TRIM
For essentially noncorrosive liquids or gases. Typical examples are crude
and refined oils, natural or refined gases and processed hydrocarbons.
Typical uses are wellheads, manifolds, flowlines and other similar
installations requiring a through conduit valve. The temperature limitations
are 0 degrees to 250 degrees F.
T-22 BB STAINLESS TRIM
For substantially the same service as T-21 but where the corrosion
resistance of 13 Chrome Stainless Steel internal parts are desirable. Also
usable for mildly corrosive fluids and gases when limited corrosion of the
internal body surfaces can be tolerated. The temperature limitations are
0 degrees to 250 degrees F. Recommended when partial pressure of CO2
is greater than 30.
T-23 CC FULL STAINLESS TRIM
For any liquid or gaseous product for which the resistance of the 13
Chrome Stainless is adequate. Also used where the resistance of Stainless
Steel is desirable from the standpoint of product purity. The temperature
limitations are 0 degrees to 250 degrees F. Recommended when partial
pressure of CO2 is greater than 30.
T-24 EE SOUR GAS AND OIL
Primarily for sour gas and oil where resistance to Hydrogen Sulfide
embrittlement is required. Also suitable for other chemicals, products or
hydrocarbons when H2S is present. May be used when CO2 is present in
smaller amount than H2S. The temperature limitations are 0 degrees to
250 degrees F.
T-26 FF STAINLESS SOUR GAS AND OIL TRIM
Primarily for sour gas and oil when the CO2 content exceeds the H2S
content. It is intended to provide resistance to the metal loss type of
corrosion usually associated with CO2 plus resistance to Hydrogen Sulfide
embrittlement. The temperature limitations are 0 degrees to 250 degrees F.
T-27 WATERFLOOD (UNINHIBITED)
Primarily for use in untreated or uninhibited brackish saline water typically
associated with oilfield waterflood projects and/or disposal wells in which
the internal plastic coating of the body surfaces provides resistance to salt
water corrosion. The internal parts are also resistant to Sulfide
embrittlement and corrosion. The temperature limitations are 0 degrees
to 250 degrees F.
T-36 AA LOW TEMPERATURE - STANDARD TRIM - GENERAL OILFIELD
For essentially noncorrosive liquids or gases. Typical examples are crude
and refined oils, natural or refined gases and processed hydrocarbons.
Typical uses are wellheads, manifolds, flowlines and other similar
installations requiring a through conduit valve. The temperature limitations
are -50 degrees to 180 degrees F.
T-37 EE LOW TEMPERATURE -SOUR GAS AND OIL
Primarily for sour gas and oil where resistance to Hydrogen Sulfide
embrittlement is required. Also suitable for other chemicals, products or
hydrocarbons when H2S is present. May be used when CO2 is present in
smaller amount than H2S. The temperature limitations are -50 degrees to
180 degrees F.
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