5 Key Points for Qualification Review of Seamless Steel Pipe Suppliers

Verification of basic enterprise qualifications

1. Industrial and commercial registration information

Including the original and duplicate business license, unified social credit code certificate and tax registration certificate.

2. Proof of production capacity

The supplier of seamless steel pipes needs to provide real-life photos of the production base, equipment list, annual production capacity report and professional technical team composition.

3. Financial credit documents

Audit reports for the past three years, bank credit rating certificates and tax payment certificates.

Product technical parameter documents

1. Specification parameter table

The supplier of should list the seamless steel pipes size, outer diameter, wall thickness, length tolerance and material chemical composition of seamless steel pipes in detail.

2. Inspection and certification documents

Mechanical properties test report, non-destructive testing report and pressure level certification of seamless steel pipes issued by a third-party organization.

3. Production standard description

Clearly implement national standards, industry standards or international standards (ASTM/EN).

Quality management system certification

1. System certification certificate

ISO9001 quality management system, API monogram certification and other valid qualifications.

2. Process control documents

Including the inspection records of raw materials entering the factory for seamless steel pipes, process quality control point charts and finished product inspection procedures.

3. Laboratory qualifications

CNAS-accredited laboratory certificates and calibration records of testing equipment.

Construction of after-sales service system

1. Quality commitment

Clearly define the warranty period, return and exchange terms and quality dispute resolution solutions for seamless steel pipes.

2. Technical service plan

Provide installation guidance manuals, welding process assessment reports and regular inspection plans for seamless steel pipes.

3. Emergency response mechanism

Including 24-hour technical hotline, spare parts inventory list for seamless steel pipes and fault handling time commitment.

Special qualification supplementary materials

1. Industrial product production license (when involving pressure pipe components).

2. Environmental protection acceptance documents and safety production standardization certificates.

3. Key project cooperation cases and customer evaluation reports.

Summary

Complete and standardized qualification documents can not only reflect the comprehensive strength of seamless steel pipe suppliers, but also be an important basis for purchasers to conduct risk assessment and supplier grading management. All submitted materials must be within the validity period and stamped with the company's official seal to confirm their legal effect.