LONGMA was founded in 2003, with a registered capital of 131.8 billion, covering an area of 70,000 square meters, with a total investment of 250 million yuan. In 2006, an investment of 310 million yuan has built a new plant area and covers an area of 150,000 square meters. The company specializes in the production: large-diameter thick-walled double-sided sub-arc-seam welding steel pipe, LSAW, ERW steel pipes…

Longma new factory introduced a set of German JCO equipment, on the basis of which 4 sets of 16 double-sided submerged arc welded pipe production lines were added, with 4 sets of JCO molding machines, including 3,000T, 8,000T, 10,000T, and 16,000T. By the end of 2013, the company’s annual output exceeded 300,000 tons.

Longma is an enterprise that stands out from China’s welded pipe industry in recent years. Our company has more than 300 employees, more than 60 technical personnel, a variety of testing equipment, with the independent equipment research team, has been committed to technology-oriented for a long time.

Products: large diameter thick wall double-sided submerged arc straight seam welded steel pipe (JCOE)

Specification

Φ 60.3mm-2,020 mm, wall thickness: 3.91mm-100mm

Standard

*API 5L(ISO 3183) PSL1/PSL2:GR.B, X42-X80;
*ASTM A53:GR.A/B;
*ASTM A500: GR.A/B;
*ASTM A252: GR.1/2/3′
*EN10210/EN10219: S235/S275/S355JRH/J0H/J2H;
*AS/NZS 1163-2016: C250/C250L0, C350/C350L0, C450/C450L0.

Our certificates

API 5L, ISO9001, FPC, ISO14001, ISO18001…

The purpose of our company

Quality is the foundation of enterprise surviva