Welding processes, Mechanical Engineering

Assignment Help:

Q. Show the Welding processes

The following welding processes are permitted:

Shielded Metal-Arc Welding (SMAW) - Do not use SMAW for the root pass of single side groove welds except for carbon steel.

Gas Tungsten-Arc Welding (GTAW).

Automatic Submerged-Arc Welding (SAW-AU):

a) The flux used shall be "neutral" and shall not contribute alloying elements to the weld.

b) The flux-wire combination used for production welding shall be the same brand name and type as used for procedure qualifications.

c) Maximum weld deposit per pass shall be 12.7 mm (1/2") for carbon steel (P-1) and 10 mm (3/8") for all other materials.

Flux-Cored Arc Welding (FCAW) will not be permitted unless otherwise authorised by the OWNER.

Gas Metal-Arc Welding (GMAW) shall be used only in spray transfer mode. Pulse arc is considered spray transfer. Spray transfer mode shall not be used for root pass.

The Short Arc transfer mode is acceptable for carbon steel materials up to and including 3/16 inch (5 mm) thick and for the root pass in carbon steel material of any thickness with the following provisions:

a) Vertical welding is done in the uphill progression.

b) The root pass is back-gouged.

c) GMAW-S is not used on branch connections, o-let, socket type welds, or pipe less than or equal to 3 inches (75 mm) OD.

Plasma-Arc Welding (PAW) for hard surfacing and overlaying.

Welding processes other than those listed above require specific approval by the OWNER and shall not be assumed as acceptable by the Seller during bid preparation.


Related Discussions:- Welding processes

Plant layout optimization, How to do matlab coding for computerized relativ...

How to do matlab coding for computerized relative allocation of facilities technique

What are the instructions to charge a battery?, (a) How is specific gravity...

(a) How is specific gravity of electrolyte (battery water) measured and what should be the value of specific gravity? (b) How would you measure battery voltage and what is its reco

Desirable characteristics of the piston , Desirable Characteristics of the ...

Desirable Characteristics of the Piston Silent in operation. Seizure between piston surface and inside of cylinder should not occur. Sufficiently resistant to co

Show conceptual layout of plant, Q. Show Conceptual Layout of plant ? D...

Q. Show Conceptual Layout of plant ? During the Evaluate phase of a project, the early concept design considers broad information of the expected installation, and its basic cr

Explan the drive or traction unit, Explan the Drive or traction unit   ...

Explan the Drive or traction unit   Hydrostatic drive is provided for traction with a two speed gear-box. High speed is for travelling and low speed for working. Speed is in

Steam, what is dry ness fraction?

what is dry ness fraction?

Driveshaft design, The  impeller driveshaft  can either be top driven or bo...

The  impeller driveshaft  can either be top driven or bottom driven. Again there are advantages of each and the choice often varies with scale of operation: (a) Top driven (labo

Ottto cycle, For a theoretical OTTO cycle operating on compression ratio of...

For a theoretical OTTO cycle operating on compression ratio of 8.5:1taking in air at 15C and 101.3kPa and having a maximum cycle temp of 1800C.Calculate the temp after compression,

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd