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

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General Technical Specification
Item Size Range Description Dimensional/
Design
Standard
Gases & Liquid Fluids
Page 38 of 51
Material -
Carbon Steel
Throttling DN 15 to 40 Globe valve, SCRF; # 800 BS 5352 Body ASTM A105;
13% Cr Trim
Non- DN 15 to 40 Check valve SCRF; # 800 BS 5352 Body ASTM A105;
return
Lift type
13% Cr Trim
Bolting All
M/C BOLT B 18.2 ASTM A307 Gr B
(GALV)
Nuts B 18.2 ASTM A563 Gr B,
(GALV)
Piping Flanged Joints
Fabricatio
n
Pipes
Joints
Screwed Coupling
Temp. Conn. Flanged Installation as MEC std.
Pressure Tapping DN 20 – SW half coupling Nipple HEAVY with Gate valve to spec.
Vents MEC std.
Drains MEC std.
PIPING MATERIAL SPECIFICATION
SERVICE : LOW PRESSURE STEAM, MEDIUM PRESSURE STEAM, CONDENSATE & BOILER
FEED WATER
SERVICE CONDITIONS : Maximum Operating Pressure 18 kgf /cm2 Temp 360 o C
CORROSION ALLOWANCE : 1.5 m.m.
Item Size Range Description Dimensional/
Design
Standard
Pipe
Pipe
Fittings
DN 15 To 500 Carbon steel seamless pipe
with bevel ends
Welded Fittings
Bends
Tees /
Reducers
Below DN 50 Bends fabricated from
pipes by cold bending with
3D radius and socket
welded ends, 3000#
Forged carbon steel elbow,
3000# with socket welded
ends.
DN 50 to 500 Bends fabricated from
pipes by cold/hot bending
with 3D radius, 3000#
Forged seamless carbon
steel LR elbow with butt
welded ends, 3000#
Below DN 50 Forged carbon steel Tees /
Reducers with socket
welded ends
Material -
Carbon Steel
ANSI B 36.10 ASTM 106 GR.B or
equivalent
ANSI B 16.11 ASTM A 105
ANSI B 16.9 ASTM A234 Gr. WPB,
Sch 40
ANSI B 16.11 ASTMA 105
GS-02