4 General Technical Specification of Bhilai Steel Plant, SAIL ...

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General Technical Specification
If not covered above, the valve shall be as per B16.34 and relevant MSS SP Standard
DN 50mm and larger steel Gate, Globe & Check valves in Hydrocarbon and utility
service shall have bolted bonnets. Pressure seal bonnets or covers shall be used for
Class 900# and above to minimize bonnet leakage. However, valves with pressure seal
bonnet shall have wall thickness & seal stem diameter as per API600. Welded bonnets
or screwed & seal welded bonnets are acceptable for sizes lower than DN 50 for Class
900# & above.
PIPING MATERIAL SPECIFICATION
SERVICE : BF Gas, CO Gas, BOF Gas, Corex gas & Mixed Gas
SERVICE CONDITIONS : Maximum Working Pressure 1500mmWC Temp 60 o C
Minimum Working Pressure 50 mmWC Temp 5 o C
CORROSION ALLOWANCE : 2 m.m.
Item Size Range Description Dimension Material
Standard Specification
Pipe DN 15 to 40 ERW, PE; Sch Heavy IS : 1239 part-1 IS:1239 - Black
Fittings
Flanges
#150
Gaskets
DN 50 to 150 ERW, BE; Sch Heavy IS : 1239 part-1 IS:1239 - Black
DN 200 to 350 ERW, BE; 6 mm Thk IS : 3589 IS: 3589 Gr.330
DN 400 to 750 ERW/SWP,BE; 8 mm Thk IS : 3589 IS: 3589 Gr.330
DN 800 to 3500 Fabricated – SWP, BE;
10mm Thk.
Plate shall have copper
content of 0.25 to 0.35 %
DN 15 to 40 SW /Screwed Fittings
(Elbow R=1.5D)
Gases & Liquid Fluids
Page 30 of 51
IS : 3589 IS : 2062, Gr.B
IS : 1239 (P-2)
DN 50 to 150 BW (Elbow R=1.5D) IS : 1239 (P-2)
IS : 1239 (P-2)
Black
IS : 1239 (P-2)
Black
DN 200 & above Fabricated Miters bends &
fittings from pipe / plate
IPSS-06-20 IS : 2062, Gr.B
Upto DN 150 SORF; Serrated Finish IS : 6392
Table - 5
IS: 2062, Gr.B
DN 200 to 300 SORF; Serrated Finish IPSS:1-06-20
Table 3
IS: 2062, Gr.B
DN 400 & above SORF; Serrated Finish IPSS:1-06-20
Table 3
IS: 2062, Gr.B
Upto DN 500 Gasket: Thk. 2 mm Ring
Type CAF
As per Flange IS : 2712 Gr W/3
Above DN 500 Asbestos rope graphite
impingnated. 8mm
GS-02