What is Welding and Welding processes

05/09/2019 · In all welding, the molten metal is shielded by non-reactive gas to prevent oxidation. In gas flame welding the combustion products form this shield, but in electric arc methods, it must h provided either by a continuous supply of gas (such as argon or helium) from a cylinder or by including a combustible material ii the flux.

CN106670738A - Welding technique of G115 steel used for

Argon Arc Welding (With Diagram) - Your Article Library

Welding process of ASTM A335 P91 Pipe-Boiler Tubes,Heat

The thermocouple and pipe fittings shall be in good contact. The preheating temperature of argon arc welding shall be 150-200 ℃, the preheating temperature of electrode arc welding shall be 200-250 ℃, and the preheating width shall be calculated from the pipe wall thickness at least 3 times of each side of the groove center. Backing welding

Argon welding - Alloy Pipe, Tubes, Ceramic lined pipe

Argon welding. Argon welding use the argon as a protective gas welding technique,so also called argon gas welding. That is, around the arc of the argon gas through the air isolated from the welding area,to prevent oxidation of the weld zone. Argon welding technique is based on the general principle of arc welding using argon for metal welding consumables, welding consumables by high current to be

Welding Pressure Pipeliners and Piping Systems

This booklet is a guide to welding pipe with Shielded Metal Arc Welding (SMAW) and double ending pipe using automatic welding. Lincoln Electric supplies electrodes, power sources, automatic and semiautomatic wire feeders, submerged arc wire and flux, which are the industry standards for pipeline construction around the world.