Table Of Contents

Title:

Piping and Valves

Doc. No.

L-001

Annex

C

EDS

NTR1

Project: NORSOK

Company:

Rev.Date:

 20.09.99

Rev:

1

 

TRIM MATERIALS FOR CARBON STEEL VALVES

1 Scope

This EDS specifies acceptable trim materials for use in carbon steel valves, the corresponding standards and the general requirements to trim material. Where a material data sheet (MDS) is referred to, the requirements on the MDS shall apply.

2 Acceptable trim material

The table below lists the acceptable trim material for carbon steel valves. These are fully interchangeble.

Material type

Description

MDS

Type 13-4 SS

ASTM A 182 Grade F6NM (Forged 13Cr/4Ni)

Heat treatment:
    1. Austenitize at 1010 OC minimum and air cool or oil quench to ambient temperature.
    2. Temper at 648 to 690 OC and air cool to ambient temperature
    3. Temper at 593 to 620 OC and air cool to ambient temperature

Maximum hardness:
    • Base material: 23HRC
    • Weldments: 255 HV10 (23HRC)

 

 

 

 

 

 

 

 

ASTM A 352 Grade CA6NM (Cast 13Cr/4Ni)

Heat treatment:
    1. Austenitize at 1010 OC minimum and air cool or oil quench to ambient temperature.
    2. Temper at 648 to 690 OC and air cool to ambient temperature
    3. Temper at 593 to 620 OC and air cool to ambient temperature

Maximum hardness:
    • Base material: 23HRC
    • Weldments: 255 HV10 (23HRC)

Precipitation Hardening SS Type 17-4 ph, UNS S17400

ASTM A 564 , Type 630, condition H1150M; maximum hardness HRC 33

ASTM A705, Type 630, condition H1150M; maximum hardness HRC 33

Type 316 SS

ASTM A 182 Grade F316(L)

ASTM A 351 Grade CF8M or CF3M

Type 22 Cr Duplex SS

ASTM A 182 Grade F51

D44

ASTM A 890 UNS J92205

D46

ASTM A 276 UNS S31803

D47

Type 25 Cr Duplex SS

ASTM A 182 Grade F53, F55 or UNS S3255

D54

ASTM A 890 Grade 5A or 6A

D56

ASTM A 276 UNS S32550,S32750 or S32760

D57

Nickel Alloys

ASTM B 446, UNS N06625

N01

ASTM B 564, UNS N06625

N01

ASTM A 494 Grade CW-6MC and CX2MW

N02

ASTM B 637 UNS N07718 and N077560; Maximum hardness HRC 35

  1. Notes
  1. Samples for mechanical testing shall realistically reflect the properties in the actual components
  2. Material to this EDS shall satisfy all requirements in NACE Standard MR0175 for sour service.
  3. Repair welding of forgings are prohbited. Repair welding of castings shall be carried out to qualified welding procedures qualified on a cast plate of the same material grade which shall be welded.
  4. Castings shall be liquid penetrant examined 100% according to ASMEVIII, Div.1, App. 7, after machining
  5. Certificates to EN 10 204 Type 3.1B is required.