The company has consistently adhered to the "advanced equipment and technology as a prerequisite to quality of survival, quality and development, to management for efficiency" business principles; and constantly open up new markets, new channels for a long time with customers to establish a good relationship, the majority of customers acclaim. (Standard APISpec5L, GB/T9711.1-1997 SY/T5037-2000) Size (mm) Material: Q235, Q345, spiral and standard categories: pressure fluid walks with spiral submerged arc welded pipe (SY5036-83 ) is mainly used for bona fide oil, natural gas pipelines; walked fluid pressure high-frequency welded steel pipes with spiral seam (SY5038-83), high frequency welding lap welding method for the pressure fluid walks the spiral seam high frequency welded steel pipe. Strong pressure to steel, plastic, ease of welding and machining molding; ordinary low-pressure fluid walks with spiral submerged arc welded pipe (SY5037-83), using double-sided automatic submerged arc welding or for the legal system into the water, gas, steam and other general low pressure air and fluids walks with submerged arc welding steel pipes. 

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