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Technical capability within the manufacturing route

Certified welding

Welding for technical assemblies. Joint, material, welding sequence and distortion risk form the basis for execution and inspection agreements.

Welder working on a metal structure

The technique

Welding technical assemblies

Welding joins metal parts to form a component or assembly. The joint’s function, material, welding sequence and possible distortion determine how work is prepared and inspected. Applicable certification is confirmed for each order.

The route name is not a general certification promise. Only demonstrably applicable requirements and a confirmed scope are used for an order.

A certificate, standard, validity or material application never applies automatically to every order and is confirmed separately.

Process and approach

From welded joint to execution

Link drawing requirements to preparation, welding sequence and agreed inspection points.

Applicable standards, certificates, validity and scope are confirmed separately for each order. The existing route name is not a general certification promise.

Welder working on a metal structure

In practice

Components for industrial filtration

Stainless steel 316 filtration components measuring Ø 260 × 130 mm, for which Douna combined machining, welding and quality control.

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Stainless steel 316 filtration components after machining and welding

Part of a complete solution

Frequently asked questions

Frequently asked questions about certified welding

What information is needed for a welding enquiry?

Supply drawings, available material information and the joint’s function. State any standard, inspection and documentation requirements. Accessibility, assembly and possible subsequent operations also matter for preparation.

Which welding certification applies to my order?

This can only be established using current evidence documents and a confirmed scope for the order. The page title is not a general certification promise. Standard, validity, application scope and required documentation must be confirmed separately.

How is welding distortion accounted for?

Preparation considers the joint, assembly, welding sequence and accessibility together. Inspection and any subsequent operations align with the assembly’s function and dimensions.

Which inspections and documents accompany welding?

This depends on confirmed project requirements. Before execution, the required inspections, timing and documents for handover are agreed. Specific standards or inspections do not apply automatically to every order.

Discuss your joint and assembly