TUBING&CASING NIPPLE& NIPPLE COUPLINGS OILWELL PETROLEUM COUPLINGS CHINA SUPPLIER EXPORTER
The company has strong production capacity, strict quality control system and trade capacity. Products are strictly in accordance with API 5CT standards, all have API 5CT certificates, and has passed the ISO9000 quality management system audit. The company maintains close cooperation with some famous iron and steel enterprises in China to ensure the best raw materials are always given to customers, and each batch of materials purchased will be subjected to tensile, yield and elongation according to batch number, furnace number, Impact power and other indicators of strict reinspection and verification. If the performance is not up-to-line, the raw materials can’t be used absolutely . In the course of production, every working procedure of each product should be strictly inspected, and each piece should keep the relevant processing record, thread inspection record and flaw detection record.
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