standard specification for erection tender - GAIL

GAIL (INDIA) LTD
NEW DELHI
Pressure Safety Valves
UNITS : Gas Flow - MMSCMD, Liquid Flow - m 3 /hr , Steam Flow – Kg/hr , Pressure - Kg/cm 2 g , Temperature – Deg C , Level / Length - mm
General 1 Tag No. *
2 Line No./ Size *
3 Vessel Protected *
4 Quantity 1 nos. at Filter for fire case sizing
and 1 nos. each at regulator
outlet for creep relief
5 Safety/ Relief Safety/ creep Relief
6 Vendor *
Valve 7 Type Standard
8 Full Nozzle Full Lift Mod. Nozzle Full Nozzle Full Lift
9 Bonnet Type Closed
10 Conv./ Bellows/ Pllot Operated Conventional
11 Inlet Conn. : Size & Rating * *
12 Inlet Conn. : Facing & Finish RF Serrated 125AARH
13 Outlet Conn. : Size & Rating * *
14 Outlet Conn. : Facing & Finish RF Serrated 125AARH
15 Cap Over Adj. Bolt : Required
16 Screwed / Bolted Bolted
17 Lifting Gear - Type -
18 Test Gag Required
Material 19 Body and Bonnet ASTM A216 Gr. WCB
20 Nozzle and Disc SS 316 or better
21 Spring Cadmium Plated CS
22 Bellows *
23 Resilient Seat Seal *
Options 24
25
Spring For different set point range Required
Basis 26 Code ASME Sec-VIII / API 520
27 Basis of Selection Skid flow capacity
Service
Conditions
28
29 Fluid and State Natural Gas Gas
30 Corrosive Constituent/ Corr. Allow. CO2 (4%) / 2.0mm
31 Required Flow Capacity *
32 Mol. Wt. Oper S.G. 17.70 * 0.619 *
33 Oper. Pressure, kg/cm 2 (g) **
34 Oper. Temp.°C Rel. Temp.°C **
35 Valve Discharges to Atm.
36 Back Press. Const. Or Variable Atm. Constant
37 Set Pressure, kg/cm 2 (g) *
38 Cold Bench Test Pressure *
39 % Over Pressure % Blow Down 20 *
40 Cp/ Cv Compressibility
Factor
1.27 * 0.98 to 0.997 *
41 Viscosity at Rel. Temp. (cP) *
42 Vess. : Wall
Temp.°C
Surf. Area-m 2
* *
Orifice 43 Calculated Area-inch 2
*
44 Sel. Area-inch 2 Orifice Design * F*
45 No. of Valves Reqd. for capacity 1 *
46 Total Area-inch 2
*
47 Actual Flow Capacity Nm 3 /hr *
Others 48 Model No. *
49 Radiography Reqd. (100%)
50 IBR Certification NR
“ * “ By Vendor
PRESSURE SAFETY VALVE
DATA SHEET REV-0
0015-01-08-04-PSV-001
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