30 November 2022

Safety Valve | Boiler Drum Safety Valve | Main Steam Line Safety Valve | Safety Valve Specifications | Safety Valve Selection | MOC | Data Sheet | Specification | Safety Valve Standard Quality Plan (SQP) | Test Certificate

Safety Valve

1.) Safety Valve

 

2.) Safety Valve Parts List (Name and Photo)

 

 

 

3.) Safety Valve Parts List (Material of Construction)

1 Body Material SA 216 Gr WCB
2 Bonnet Material SA 216 Gr WCB
3 Disc Material SA 565 Gr 616
(SS-422)
4 Spindle Material SA 479 TP 316
5 Spring Alloy/ Tungsten Steel
6 Spring Washer Carbon Steel
7 Retainer Ring CF8M
8 Adjusting Ring CF8M
9 Adjusting Ring pin Assy. Steel
10 Gaskets SS 316
11 Hand Lever Provided
12 GAG Arrangement (test gag) and Spring Cover Provided
13 Applicable code IBR / ASME SEC-1
14 IBR Certificate IBR FORM III-C & attachment 8
15 Noise Level at 10 m distance dBA 126
16 GA drawing Provided
17 Weight Kg 70

4.) Safety Valve Specifications

1 Location HP Drum S.H. outlet link
2 No. of Safety valves Nos. One One
3 Fluid & State Saturated steam Super heated steam
4 Steam generation capacity Kg/hr 20200 33400
5 Required relieving capacity Kg/h 10100 8350
6 Relieving temperature °C 218.36 475
7 Design temperature °C 230 490
8 Set pressure Kg/cm2 (a) 24 22.5
9 Set pressure range Kg/cm2 (a) 23.76 – 26.36 21.72 – 23.76
10 System Design Pressure Kg/cm2 (a) 25 25
11 Allowable Over pressure % 5 5
12 Operating pressure Kg/cm2 (a) 20.5 to 23.5 18.5 to 22.5
13 Blowdown % 2.5 to 5 2.5 to 5
14 Imposed back pressure Kg/cm2 (a) Atmosphere Atmosphere
15 Valve Type & Model No. HSJ-46-IBR HSJ-47-IBR
16 Actual relieving capacity Kg/h 12845 8758
17 Valve inlet connection size & Rating NB 65 NB & #600 65 NB & #600
18 Valve inlet end connection Flanged end Flanged end
19 Valve outlet connection size & Rating NB 100 NB & #150 100 NB & #150
20 Valve outlet end connection Flanged end Flanged end
21 Orifice Type K-Type K-Type
22 Area Sq. Cm. 11.871 11.871
23 Lift mm

5.) Safety Valve Selection Parameters:-

If Boiler-1 & 2 steam generation likely to increase by 4 TPH and 1 TPH respectively So each new safety valves are considered for increase in relieving capacity approx. by 1-2 TPH as per below Annex 1.

In case safety valve set pressure is increasing, IBR formalities is also proposed.

 

6.) Safety Valve Details Required for IBR:-

A.) Safety Valve Data Sheet

 

B.) Safety Valve Drawing

 

 

 

C.) Safety Valve Standard Quality Plan (SQP)

D.) Safety Valve test Certificate

 

 

 

 

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