QA/QC Knowledge Welding & Piping.

Preheating

17 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%

16. 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 %
III. ASTM A106 Gr. C – 0.35 %.

15. What is the ASTM code for the following?
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/TP348/TP348H.
IV. 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.

14. What are the different sections of ASME code? Where are these sections referred?
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.

13. 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 (ANSI).
E. The American welding society (AWS).
F. The American Water Works Association (AWWA).
G. The American Society for Mechanical Engineers (ASME).

11. What is WPS?
Welder Procedure specifications: A document providing the required welding variables for a specific application to assure repeatability by properly trained welders and welding operators.
12. What is PQR?
Procedure Qualified Record: A record of welding variables used to produce an acceptable
test weldment and the results of tests conducted and the weldment to quality a welding
procedure specification.