Questions asked in interview of fresher piping engineer (material)

Below are the questions asked in interview of fresher piping engineer.

These questions are related to piping and engineering related to oil and gas, power plants and oil and gas refineries.
Questions:-What is the ASME code followed for design of piping systems in Process piping (Refineries & Chemical Industries)?
(i) B 31.1
(ii) B 31.3
(iii) B 31.5
(iv) B 31.9
Answer (II) B 31.3
Questions:-Which American institute standard does piping engineer refer?
Answer: –
A. The American Petroleum institute (API).
B. The American Iron & Steel institute (AISI).
C. The American Society for Testing and materials (ASTM).
D. The American National standard institute (AISI).
E. The American welding society (AWS).
F. The American Water Works Association (AWWA).
G. The American Society for Mechanical Engineers (ASME).
Questions:-What is the different ASME 31 code for pressure piping?
Answer: –
A. ASME B31.1 – Power piping.
B. ASME B31.2 – Fuel Gas Piping.
C. ASME B31.3 – Process piping.
D. ASME B31.4 – Pipeline Transportation system for liquid hydrocarbon & other liquid.
E. ASME B31.5 – Refrigeration Piping.
F. ASME B31.8 – Gas transmission & distribution piping system.
G. ASME B31.9 – Building services piping.
H. ASME B31.11 – Slurry transportation piping system.
4. What are the different sections of ASME code? Where these sections are reffered?
Answer: –
A. ASME section I : – Rules for construction of power boiler.
B. ASME Section II : – Materials.
Part A – Ferrous materials.
Part B – Non-Ferrous materials.
Part C – Specification for electrodes & filler wire.
Part D – Properties.
C. ASME Section IV : – Rules for construction of Heating Boiler.
D. ASME Section V : – Non- destructive Examination.
E. ASME Section VI : – Recommended rules for care & operation of heating boiler.
F. ASME Section VII : – Recommended guidelines for care of power boiler.
H. ASME Section VIII : – Rules for construction of pressure vessels. (Division I & II)
I. ASME Section IX : – Welding & Brazing qualification
Questions:-Which American standard is reffered for selection of following piping element? A. Flanges B. Butt Welded fittings C. Gasket D. Socket & Threaded fittings E. Valves FPipes.
Answer: –
A. Flanges :- I. ASME B16.1: – Cast iron pipes flanges & flanged fittings.
II. ASME B16.5: – Carbon steel pipes flanges & flanged fittings. (Up to 24”)
III. ASME B16.47:- Large Diameter steel flanges. (Above 24”)
B. Butt welded fittings :-
I. ASME B16.9: – Steel butt welding fittings.
II. ASME B16.28 : – Butt-welded short radius elbows & returns bends.
C. Gasket :-
I. ASME B16.20 / API -601: -Metallic gaskets for pipe flanges- Spiral wound, Octagonal ring Joint & Jacketed flanges.
II. ASME B16.21 :- Non metallic gasket.
D. Socket & Threaded fittings:
I. ASME B16.11 : – Forged steel socket welding & threaded fittings.
E. Valves :-
I. ASME B16.10 :- Face to face & end to end dimension of valves.
II. ASME B16.34 :- Flanged & butt-welded ends steel valves (Pressure &Temperature ratings) except Ball, Plug & Butter fly Valves.
F. Pipes :-
I. ASME B36.10 :- Welded & Seamless wrought iron pipes.
II. ASME B36.19 :- Stainless steel pipes.
Questions:- What is the ASTM code for the following?
A. Pipes :-I. Carbon Steel II. Alloy Steel III. Stainless Steel IV. Nickel Steel.
B. Tubes:-I. Carbon Steel II. Alloy Steel III. Stainless Steel IV. Nickel Steel.
C. Wrought Iron Fittings: -I. Carbon Steel II. Alloy Steel III. Stainless Steel IV. Nickel Steel.
D. Forged Fittings: -I. Carbon Steel II. Alloy Steel III. Stainless Steel IV. Nickel Steel.
E. Cast Fittings: -I. Carbon Steel II. Alloy Steel III. Stainless Steel IV. Nickel Steel.
F. Plates:-I. Carbon Steel II. Alloy Steel III. Stainless Steel IV. Nickel Steel.
Answer: -A. Pipes:-
I. Carbon Steel : – ASTM A53 Gr. A/B, ASTM A106 Gr. A/B/C, ASTM A333 Gr.1/Gr.6
II. Alloy Steel:- ASTM A335 Gr.P1/P2/P5/P7/P9/P11/P12/P22.
III. Stainless Steel:-ASTM A312TP304/TP304L/TP304H/TP308/TP310/TP316/TP316L/ TP316H/TP317/TP321/TP321H/TP347/TP347H/TP34/TP348H.
V. Nickel Steel:- ASTM A333Gr.3/ Gr.8.
B. Tubes:-
I. Carbon Steel :- ASTM A178/179/192, ASTM A334 Gr.1/6.
II. Alloy Steel :- ASTM A161T1, ASTM A213T1/T2/T5/T7/T9/T11/T12/T22.
III. Stainless Steel:- ASTM A213 TP304/TP304L/TP304H/TP310/TP316/TP316L/TP316H/
TP317/TP321/TP321H/TP347/TP347H/TP348/TP348H, ASTM A608 HK40.
IV. Nickel Steel:- ASTM A334Gr.3/Gr.8
C. Wrought Iron fittings :-
I. Carbon Steel :- ASTM A234Gr.WPA/B, ASTM A420 Gr.WPL6.
II. Alloy Steel:- ASTM A234 WP1/WP5/WP7/WP9/WP11/WP12/WP22.
III. Stainless Steel :-ASTM A403 WP304/WP304L/WP304H/WP309/WP310/WP316/ WP316L/WP316H/ WP317/WP321/WP321H/WP347/WP347H/WP348.
IV. Nickel Steel :- ASTM A420WPL6/WPL8.
D. Forged Fittings : –
I. Carbon Steel :- ASTM A181. ASTM A105, ASTM A350 LF1/2.
II. Alloy Steel:- ASTM A182F1/F2/F5/F7/F9/F11/F12/F22.
III. Stainless Steel :- ASTM A182F6/F304/F304L/F304H/F310/F316/F316L/F316H/F321/ F321H/F347/F347H/F348.
IV. Nickel Steel :- ASTM A350 LF3, ASTM A522.
E. Cast Fittings: –
I. Carbon Steel :- ASTM A216, ASTM A352 LCB/C.
II. Alloy Steel:- ASTM A217 WC1/WC6/WC9/C5/C12.
III. Stainless Steel :- ASTM A217 CA15, ASTM A296 CA15, ASTM A351 CF8/CF3/CH20/ CK20/CF 8M/CF 3M/CF 8C/HK40.
IV. Nickel Steel :- ASTM A352LC3.
E. Plates:-
I. Carbon Steel :- ASTM A285, ASTM A515, ASTM A516.
II. Alloy Steel:- ASTM A387 Gr.2/Gr.5/Gr.7/Gr.9/Gr.11/Gr.12/Gr.22.
III. Stainless Steel :- ASTM A240 TP410/TP405/TP430/TP304/TP304L/TP309/TP310S/TP316/TP316L/TP317/TP321/TP347/TP348
IV. Nickel Steel :- ASTM A203 Gr.D/Gr.E, ASTM A353.
Questions:- What is the basic difference between Pipe specification A106 Gr.A / Gr.B/ Gr.C.?
Answer: – Difference is due to the Carbon content. % of carbon content in : –
I. ASTM A106 Gr. A – 0.25 %
II. ASTM A106 Gr. B – 0.30 %
II ASTM A106 Gr. C – 0.35 %.
Questions:- What is the difference between pipe specification ASTM A312 TP 304 & ASTM A312 TP304L, ASTM A312 TP 316 & ASTM A312 TP 316L?
Answer: – Difference is due to the Carbon content. The Letter “L” denotes lower percentage of carbon. % of carbon content in : –
I. ASTM A312 TP 304 – 0.08 %
II. ASTM A312 TP 304L- 0.035%
III. ASTM A312 TP 316 – 0.08 %
IV. ASTM A312 TP 316L- 0.035%
These questions asked in interview of fresher piping engineer which are mention above shall help  to fresher engineer to gain  some knowledge related to piping engineering and  to get the job in oil and gas companies.

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