LSAW steel pipe (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.

Related terms are defined as follows:

HOLD

• The relevant inspectors shall be informed of the time and location of testing and a witness is required for each unit. Witnessing is mandatory during the cycle and written notice through registered check advice at least 2 weeks in advance for a special inspection or important stages and 24 hours in advance for regular inspection.

• The customer representative shall sign and seal the reports.

Witness

• The relevant inspectors shall be informed of the time and location of testing through registered check advice or another kind of official letter which shall be submitted to related parties at least 2 weeks in advance for a special inspection or important stages and 24 hours in advance for regular inspection.
  However, work may proceed without the presence of the inspector's discretion.

• The customer representative shall sign and seal the reports.

Monitor

• Work proceeds without the presence and special information of the test.

• Inspectors reserve the right to attend this activity at any time.

Review

• Check certifications and /or documents, with approved procedures, specifications, and acceptance criteria.

• Documents reviewed by the Customer representative shall be signed and sealed as reviewed.
  

Perform

• Mill performs.

Cangzhou Shenlong Pipe Manufacturing Co., Ltd. cooperates with Baosteel and Baogang to produce large-caliber seamless steel pipe, straight-seam welded pipe, spiral steel pipe, and pipe fittings. The products comply with API, ASTM, DIN, BS, and JIS standards, and can accept SGS, BV, and other inspections. The products are used in oil, natural gas, bridge, water conservancy and other large-scale projects, which are worthy of trust.