T ECHNICAL SPECIFICATIONS OF VALVES

\The specification covers supply of Petroleum and Natural Gas lndustries-Pipeline Valves to be used for the existing facilities in the Sahara of Tunisia.:

I. SERVICE CONDITIONS :

Fluids: Oil/Gas & Corrosive Crude Water Loaded with sand; Temerature range: -5° C to 65° C;

CO2: 0, 5 % (Mol.);

H2S: 0;

Salinity: 50 to 250 g/Liter

II. TECHNICAL CHARATERISTICS OF :

1°/Ball Valves (robinet à boisseau sphérique)

- Type: Full bore trunnion mounted ball valve and reduced bore for items 14 and 16;

- Design and manufacture: API 6D, ASME B 16.34

- Inspection and test: API 598;

- Certification: API 60;

• End flanges: ASME B 16.5;

- Face to Face  and End to End dimensions of valves: ASME/ANSI B16.10;

- Ends: RTJ for pressure rating ANSI 600 through ANSI 900;

- Ends: RF for pressure rating ANSI 150 and ANSI 300;

- Lever operated for 4" and 6";

- Gear operated for 8'', 10", 12" and 18" valves;

- Material:

o Body: Forged steel ASTM A105 GR.B;

o Stem, Ball, Washers : AISI 316L;

o 0-rings : Viton ;

o Seat/Seal : PTFE + C or Viton ;

o Cap/Cover Bolts and nuts: ASTM A193 Gr.L7 and ASTM Al94 Gr. 2H.

2°/Gates disc valves (robinet à disque):

- Type: Full bore;

- Design and manufacture: API 6D, APl 600, ASME B16.34;

- Inspection and test: API 598;

- Certification: API 6D;

- Ends flanges: RF according to ASME B16.5;

- Face to Face and End to End dimensions of valves: ASME/ANSI B16.10;

- Type of operation: Handwheel (cast iron);

- Material:

* Body and Bonnet: ASTM A216 WCB or ASTM A105

* Wedge: A182F6 + Stellite (Flexible);

* Body seats: A182F304 + Stellite;

* Stem /A182F304;

* Cap/Cover Bolts and nuts: ASTM A193 Gr.L7 and ASTM A194 Gr.2H;

4°/ Gate Check valves (clapet à battant)

- Type: Swing Check valve with removable seat;

- Design and manufacture: APT 6D, ASME B 16.34 ;

- End flanges : ASME B 16.5 ;

- Inspection and test:  API 598 ;

- Ends : RTJ for pressure rating ANSI 600 through ANSI 900 ;

- Ends: RF for pressure rating ANSI 150 and ANSI 300;

- Material:

o Body: A216 WCB;

o Disc: A216 WCB;

o Disc face: AWS Cr 13

5°/ Butterfly Check valves (clapet sandwich)

- Type: Swing Check valve with removable seat;

- Design and manufacture: APT 6D, ASME B 16.34;

- End flanges: ASME B 16.5;

- Inspection and test: API 598;

- Ends: RTJ for pressure rating ANSI 600 through ANSI 900;

- Ends: RF for pressure rating ANSI 150 and ANSI 300;

- Material:

o Body: A216 WCB;

o Disc: A216 WCB;

o Disc face: AWS Cr 13

Note: All valves must be equipped with Stainless Steel nameplate. .