Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of black metal pipe in China. Welcome to buy discount black metal pipe made in China here from our factory. Quality products and low price are available.
Product introduction
The raw materials of spiral steel pipe are strip steel coil, welding wire and flux.
Before forming, the steel strip is leveled, trimmed, surface cleaned and transported, and pre-bent.
The weld control device is used to ensure that the weld meets the welding requirements, and strictly control the pipe diameter, dislocation and weld.
After being cut into a single steel pipe, each batch of three steel pipes must go through a strict first-time inspection system to check the mechanical properties, chemical composition, fusion status of welds and surface quality of steel pipes, and ensure that the pipeline manufacturing process is qualified through nondestructive inspection. Before it can be officially put into production.
Certifications
API 2B
API 5L
GOST
ISO 9001
EN 10219
EN 10210
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