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Questions related to Welding/ Weld defects/Post heating/Post weld heat treatment/ Electrode/Filler wire. Q:- What do you mean by following type of welding?

TIG Answer:- A. SMAW: – Shielded Metal Arc Welding. • TIG: – Tungsten Inert Gas Welding. Q:- Mention the contents of TIG welding set?

Torch: Consist of hose for argon gas / welding lead / ceramic nozzle/ collet / tungsten rod as cathode to create arc. • Regulator with Pressure Gauge (HP & LP) & flow meter. • Argon cylinder – Gr.2 / Gr.1 depending upon requirements of the job. • Transformer / Rectifier. • Filler wire 3. Q:- While welding of pipe trunnion to pipe/reinforcement pad you have to put a hole or leave some portion of welding why? Answer: For venting of hot gas which may get generated due to welding.

Q:- What is the thumb rule to calculate Current required for Welding? Answer: 20±Current (Amp) = [Diameter of Electrode (mm) X 40] 5. Q:-What is the minimum thickness of cs pipe that requires stress relieving to be done as per B31.3? Answer: – 19.05 mm thk. Q:-Which is the Electrode & filler wire used for welding of following materials?

• Alloy steel • ASTM A335PI • ASTM A335P2 III. ASTM A335P11 • ASTM A335P5 • ASTM A335P9 • Stainless steel • ASTM A312TP304 • ASTM A312TP304L III. ASTM A312TP304H • ASTM A312TP308 • ASTM A312TP310 • ASTM A312TP316 VII. ASTM A312TP316L VIII. ASTM A312TP316H • ASTM A312TP321 • ASTM A312TP321H Answer: – Covered Electrode Bare electrode Alloy Steel • ASTM A335PI E7018 E70 S-1B • ASTM A335P2 E8018-B1 — III. Breath Of Fire 3 Psp Iso Deutsch. ASTM A335P11 E8018-B2 ER515 • ASTM A335P5 E502 ER502 • ASTM A335P9 E505 ER505 Stainless Steel • ASTM A312TP304 E308 ER308 • ASTM A312TP304L E308L ER308L III. ASTM A312TP304H E16-6-2 ER16-8-2 • ASTM A312TP308 E309 ER309 • ASTM A312TP310 E310 ER310 • ASTM A312TP316 E316 ER316 VII.

ASTM A312TP316L E316L ER316L VIII. ASTM A312TP316H E16-8-2 ER16-18-2 • ASTM A312TP321 E347 ER347 • ASTM A312TP321H E16-6-2 ER16-8-2 7. Protel 99se Crack here. Q:-What are the common welding defects?

Answer: – • Lack of penetration. • Lack of fusion. • Slag inclusion. • Faulty weld size & profile. • Distortion. • Lack of penetration.