PIPING QUESTIONER

PIPING QUESTIONER

1. Name the various types of Fittings used in Piping?

Elbows, Tees, Reducers, Returns, Cross, Cap, Stub Ends, Couplings, Nipples, Unions.etc.

2. Name the Type and material of construction for the Bolts and Nuts normally used in piping?

ASTM A 307 – Low Carbon Steel

ASTM A 320 – Alloy Steel

ASTM A 563 – Carbon and Alloy Steel Nuts

ASTM A 193 – Alloy Steel Bolting Material for high temp. Services

ASTM A 194- Alloy Steel nut material for high temperature Services.

3. For Flanges Class 900lb and above rating which type of Flange is recommended?

Ring Type Joint (RTJ).

4. What is Hydro Static Test?

A Pressure test conducted using water or other approved liquid used as test medium.

5. What is Pneumatic test?
6. A pressure test conducted using air or other approved gas used as test medium.
7. What is Service test?

A pressure test conducted at operating pressure using the service fluid.

8. What is the Hydro static test pressure and duration for the testing of the pipe and pipe lines?

1.5 X Design Pressure and duration 30minutes max.

9. Why do we conduct pressure testing in piping?

To determine the strength and integrity of the pipe and the joint.

10. What are the types of the flushing methods used in piping after hydro test?

Water Flushing, Pneumatic Flushing and Pressurized Air Shock Blowing (PSAB)

11. What are the factors affecting bolt torquing?

Flange rating, Bolt size, Type of gasket and Friction factor of the Thread Lubricant.

12. What are the common lubricants used in bolting?

Moly Graphite, KOPR KOTE, Graphite and Oil, and Jet lube SS-30.

13. What are the Torque Values for the First and Last Stage for a Flange bolt tightening?

First Stage – Not more than the 30% of the Final torque Value.

Second Stage –With in (+or-5%) of the Final Torque Value.

14. What are the contents of a Hydro Test Package?
15. Index
16. Reference Drawings and Control Sheet
17. Pre-Hydro test Check List
18. Safety Instruction Sheet
19. Isometric Drawing.
20. P&ID
21. Pressure test Report
22. Punch list Sheet
23. Hydrostatic Test Diagram.
24. Welding/NDE Summary
25. Internal Cleaning Report
26. Flush Grinding Report(If Necessary)
27. Water Chemical Analysis Report
28. Flushing Report
29. Bolt Torquing Report(If necessary)
30. Post-Hydro-test check list
31. Calibration Reports.
32. Test Manifold 2.Pressure Gauges. 3. Safety Relief Valve.
33. Lay-up Report
34. What are the types of supports used in piping?

Saddle Supports, Hanger supports, spring Supports, Anchors, Guides, Line Stops, Trunnion, Dummy Supports and Special Supports. Etc.