Table Of Contents

Title:

Piping and Valves

Doc. No.

L-001

Annex

C

EDS

NTR2

Project: NORSOK

Company:

Rev.Date:

 20.09.99

Rev:

1

 

TRIM MATERIALS FOR TYPE 316 SS VALVES

1 Scope

This EDS specifies acceptable trim materials for use in TYPE 316 SS 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 TYPE 316 SS valves. These are fully interchangeble.

Material type

Description

MDS

Type 316 SS

ASTM A 182 Grade F316(L)

ASTM A 351 Grade CF8M or CF3M

Type 13-4 SS

ASTM A 182 Grade F6NM

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 (23 HRC)

Impact tested at -101 OC to give energy values of 27/20 J in average and minimum single values respectively.

 

Precipitation Hardening SS Type 17-4 ph, UNS S17400

ASTM A 564, Type 630, condition H1150M

  • Maximum hardness HRC 33.
  • Impact tested at -101 OC to give energy values of 27/20 J in average and minimum single values respectively.

 

 

 

ASTM A705, Type 630, condition H1150M

  • Maximum hardness HRC 33.
  • Impact tested at -101 OC to give energy values of 27/20 J in average and minimum single values respectively.

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; Maximum hardness HRC 35

Titanium

ASTM B 348 Grade 5

ASTM B 381 Grade F5

 

  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.