HP SUPERHEATED STEAM LINE WELDING JOINT
HP SUPERHEATED STEAM LINE WELDING JOINT
(OP)
Dear all, Good afternoon !
We are working over outlet of Super heater Gate valve (12" X 10" X 12" X 2500# BW)on superheated steam line
(12", Des.Pressure 130 Kg/ Cm2, Temp.: 540°C ) this valve having equalizing line (1")with 1" Globe valve.
(Line is from Valve body to Valve body), My question is as follows:
1) What should be the type of welding joint for equalizing line 1" to Globe valve 1"x 2500 # - SW or BW?
2) Should we follow 12" main line specification for above weld joint? if not then..
3) Does any separate spec. for such Equalizing/ balancing line? if yes which one.
With Regards
We are working over outlet of Super heater Gate valve (12" X 10" X 12" X 2500# BW)on superheated steam line
(12", Des.Pressure 130 Kg/ Cm2, Temp.: 540°C ) this valve having equalizing line (1")with 1" Globe valve.
(Line is from Valve body to Valve body), My question is as follows:
1) What should be the type of welding joint for equalizing line 1" to Globe valve 1"x 2500 # - SW or BW?
2) Should we follow 12" main line specification for above weld joint? if not then..
3) Does any separate spec. for such Equalizing/ balancing line? if yes which one.
With Regards





RE: HP SUPERHEATED STEAM LINE WELDING JOINT
"...when logic, and proportion, have fallen, sloppy dead..." Grace Slick
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
Thanks for your reply,
My further question is,
1) In my case HP steam line PIPE CLASS says BW joint does it applies to valve equalizing line too?
2) If not then do we have any specific coding for such lines (Equalizing/Balancing, etc.)in valve construction codes?
i.e do we have any Guideline which state line (Equalizing/Balancing, etc.)should be of SW or BW etc.? (connecting to valve body)
With regards
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
Mostly the components with sizes are in that pipeclass.
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
With regards
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
We are the owner and want to validate SW but couldn't get the code where it is clearly mentioned that SW is allowed?
This valve is supplied & installed in early 60's so which code they refer for construction (here specifically equalizing line)?
With regards
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
why should You change that, SW is not that good because of the corrosionspace between pipe and socket.
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
Pl. check the attached Dwg. for the Valve (Highlighted) portion which is the concern here
and if still no change in your opinion then it's done.
With regards
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
As SW is weak enough to crack development under 130 Kg/ Cm2 & 540° C as it is just a fillet welding.
Valve Equalizing line also under line cond'n it is suppose that it is wrong construction.
With regards
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
RE: HP SUPERHEATED STEAM LINE WELDING JOINT
but by reliability & RCA point of view it is substandard design.
Thanks for all of you guys for your valuable comments & expect in future too !
With regards