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ISO 3834 Audit Process

Adapted: 8 October 2026. Practical guidance reviewed: 15 September 2026.

Direct answer

An ISO 3834 assessment examines implemented welding controls. Trace a real joint from contract requirements and material identification through WPS, personnel qualifications and inspection results. Demonstrate how subcontracted or site welding is controlled and how defects are repaired and rechecked; the selected body's programme defines the certification decision.

Practical questions for this decision

What should the main manufacturer do after finding a defect in subcontracted welding?

Identify joints, materials, procedures, personnel and inspection records. Outsourcing does not remove your acceptance responsibility. Investigate causes and effects on similar work and plan suitable repair and reinspection. The subcontractor's certificate alone does not justify accepting defective work.

Can an organisation establish scope if welding is outsourced?

Define technical conditions, supplier competence, inspection and acceptance responsibilities. Identify activities actually managed and assumed within the assessed scope. Supplier certification can help but must represent the work and its boundaries. Do not present uncontrolled outsourced work as your own demonstrated production competence.

Read the complete practical guide

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