The square and rectangular welded steel pipes of Tianjin Yuantai Derun Group won the AAAAA product certification of the Metallurgical Industry Planning and Research Institute
The square and rectangular welded steel pipes of Tianjin Yuantai Derun Group won the AAAAA product certification of the Metallurgical Industry Planning and Research Institute
On December 30, 2022, the square and rectangular welded steel pipes of Tianjin Yuantai Derun Group won the AAAAA product certification of the Metallurgical Industry Planning and Research Institute
Certification factory unit: Tianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd
Address of certification factory: No. 2, Hengtong Road, Daqiuzhuang Industrial Park, Jinghai District, Tianjin
Certification product category: square and rectangular welded steel pipe
Certification product name: rectangular welded steel pipe
Product model and specification: Q235B, Q355B, Q355C, Q355D, Q420, Q460
（20*40）mm2 ~(800*1200)mm2
Standards and technical requirements:
T/SSEA 0109-2021 Guidelines for Quality Grading and Grading Evaluation of Square and Rectangular Welded Steel Pipe Products
Certification mode: initial inspection+product sampling inspection+supervision after certification
AAAAA
Issued by: Metallurgical Industry Planning and Research Institute
Date of issue: December 30, 2022 Expiry date: December 29, 2025
The standard is based on the specific requirements of "assured" for square and rectangular welded pipes for structural use, square and rectangular steel pipes for general structural use, taking into account quality consistency, quality feedback, product certification, honors and awards at the product level, quality assurance capability, innovation capability, corporate integrity, service level and information technology at the enterprise level. The level of content, around the transmission of enterprise product quality assurance capabilities and product brand value, the development of scientific and reasonable, advanced and applicable evaluation criteria, for the next step in the structural use of welded pipe, general purpose cold-rolled or hot-rolled welded steel pipe brand certification to provide the basis for confidence, cultivate and build steel products "confidence brand".