1/2 Inch Tubing Hydro Test Required?

You give so little information that one can estimate that there is a homework question attached.

1/2 in O.D. X 0.035" W.T. 304/304L Seamless pipe is used. What more information would you need?

Just assume you need to hydro-test it.

Now don't ask how to do this but I have the feeling you will . .

"What more information would you need"

Customer specifications. Customer requirements.

Codes, regulations and specifications controlling the construction and testing of the pipeline.

An explanation as to why you don't already know the answer to this question???

1. What pressure is the system operating at?
2. What material is being pressurized? (water - oil - gas)?

Only the temperature, pressure and nature of the contents of the pipe, and access to the end Client's Piping Standards document. Is there some particular reason why these are not already available? They cannot be seen from here.

Is it open? How would you test it?

Is it under pressure and hydro carbons in it? Why would you not test it?

Your information is vague and imprecise.
" on a 30" Gate valve"
Welded or threaded?
Is a flange valve or a weld valve?

If is a flange valve... Orifice flange?
What do you try to mean with "as a thermal relief line"
Please explain.

Dear Mr.ravinder4143,

½" Stainless Steel Pipe - Is it welded or screwed.

Gate Valve - What is the Material.? Is it Cast Steel or Cast Iron.? If the SS pipe is to be welded, to the valve, then correct choice of electrode is to be chosen or else the welding will be a problem, and leakage will occur. Hence hydro Testing is a must.

Thermal Relief - what exactly you mean.?

Pl. clarify.

The common logic calls for Hydraulic Testing of valve with the 30 Inch Valve.

DHAYANANDHAN.S

Sounds like a refinery spec application. Consult your QA/QC lead who will buy the customers QA/QC rep lunch and discuss common sense approaches wrapped in safety on what portions of the systems tests needs to be provided. You don't have a test "matrix" for the project?

I assume your thermal relief line is not pressurized, in which case it does not need to be hydro-tested.

Otherwise you are mis-describing your tubing. Normally a relief line is a pathway from a "pop-off" valve which is placed between LNG valves that can be closed. The pop-off and relief line vent over-pressure from solar heating of the line.

Only if you are venting into a closed collector would be my guess and that collector will then have some sort of relief as well....

This may steer you in the right direction......http://petrowiki.org/Relief_valves_and_relief_systems#Discharge_piping

If that is a standard pipe size then it's nominally 1/2" ID not OD, just saying....

If it were to leak, what would be the outcome?

How much energy is in the line when at its maximum pressure - in excess of 215bar-litres?

What does your leak indemnity insurance assessor say?

Yourball.

Only the end facility's piping standards can determine the answer to the question.

ravinder4143
Where did you go. We miss you.
NOT!
Typical poster!

Please be patient. I am gathering all the information I can and will share it..

Will do!

Is the tubing on the inlet to the thermal relief valve or the discharge? (hence at atmospheric or very close) If the latter my guess would be it does not need hydro testing, but it depends on the plant arrangement, and client's specs etc.