Tel: +86-0731-88672086   E-mail: info@great-pipe.com
Home » News » Pipe News » Welding process of 37Mn5 oil casing pipe

Welding process of 37Mn5 oil casing pipe

Views: 4     Author: Site Editor     Publish Time: 2023-10-26      Origin: Site

Welding process of 37Mn5 oil casing pipe:


(1) Gas shielded welding using 80% Ar+20% CO2 is the chosen welding technique.

The choice of welding materials is made using ER55-G, a 3.2 mm-diameter welding wire.


Welding parameters: voltage 26–30V, current 250–320A;


Welding speed: 35–50 cm/min; preheating temperature: 100°C; this ensures that the interlayer temperature cannot be 30°C higher than the preheating temperature nor lower than it.


Air cooling without any heat treatment is the post-weld treatment.


(2) The 80% Ar+20% CO2 gas shielded welding method was chosen.

The choice of welding materials is made using ER55-G, a 3.2 mm-diameter welding wire.


Welding parameters: voltage 26–30V, current 250–320A;


Welding speed: 35–50 cm/min; preheating temperature: 100°C; this ensures that the interlayer temperature cannot be 30°C higher than the preheating temperature nor lower than it.


After welding, the temperature is tempered to 600±20°C for four hours, with a heating rate of 50°C per hour and a cooling rate of 50°C per hour.




Hunan Great Steel Pipe Co.,Ltd
Hunan Great Steel Pipe Co.,Ltd is a world-class production and service provider of submerged arc straight seam welded pipe as the first subsidiary of Shinestar Group. Hunan Great Steel Pipe Co.,Ltd pays more attention to in the pipeline engineering research areas as a pioneer of China Petroleum Pipeline & Gas Pipeline Science Research Institute.

PRODUCT CATEGORY

QUICK LINKS

CONTACT US
 Tel: +86-0731-88672086 
 E-mail: info@great-pipe.com
 Address: Hunan Steel Industrial Zone,No.9 Xiangfu Road, Yuhua District, Changsha,    Hunan, China
LEAVE YOUR MESSAGE
Copyright © Hunan Great Steel Pipe Co.,Ltd. All Rights Reserved. Sitemap