ISO 3834-6 PDF

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Document Information click to expand document information Description: Quality requirements for fusion welding of metallic materials — Part 6: Guidelines on implementing ISO Date uploaded Nov 02, Did you find this document useful? Is this content inappropriate? Report this Document. Description: Quality requirements for fusion welding of metallic materials — Part 6: Guidelines on implementing ISO Flag for Inappropriate Content.

Download Now. Related titles. Carousel Previous Carousel Next. Metallography and Microstructure in Ancient and Historic Metals. Jump to Page. Search inside document. Al Hight fs. No resale offs documents otented. Documentation, Quality system conn a Selecting the level of quality requirements Implementation in fabrication.

Requirements review and technical review. Welding coordination Equipment Welding activitie Storage of parent metal. Calibration and validation. Identification and traceability The work of preparing international Standards is normally carried out through SO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that commitee.

International organizations, governmental and ron-governmentat, in liaison with ISO, also take part in the work. Draft Intemational Standards adopted by the technical commitiees are circulated to the member bodies for voting. A Technical Repor is entirely informative in nature and does not have to be reviewed until the data it provides are considered to be no longer valid or useful Attention is drawn to the possibilty that some of the elements of this document may be the subject of patent rights.

The quality of the Weld is manufactured into the product, not inspected. This means that welding normally requires continuous contro or that specific procedures be followed, or both. ISO deals with quality requirements in welding and has been prepared in order to identity those controls and procedures.

A reference to a particular part of ISO should be sufficient to demonstrate the capabilites of the manufacturer to control welding activities for the type of work being done. This concept also applies to committees responsible for drafting product standards. However, assessments by customers and certiication by independent bodies are growing trends in commercial relations and the standard can Serve a8 a basis for these purposes, as well as for the demonstration of performance by those manufacturers implementing it.

For dates references, only the edition led applies. Abbreviated terms For the purposes of this document, the following abbreviated terms appiy. Purchasers and users Purchasers and users of welded products may specify in contract documents that manufacturers demonstrate their competence by compliance with ISO Committees drafting produc! Each part of ISO is designed to provide a complete set of quality requirements; additional requirements should not need to be specified unless very compelling reasons exist.

The committee should also select the appropriate quail requirement standard or standards to be applied. The development Of tables Inking parts of ISO with or without other qualty-related standards such as to fequirements other than those given in ISO , is strongly discouraged. Standards that do not provide equivalent conditions may be adopted if they are referenced in product standards that are used in full by the manufacturer Product standards that have been operated satisfactorily in service may be considered by a manufacturer as being recognized for application with ISO , Where a manufacturer bases his demonstration of conformity to ISO on product standards, it is the responsiblity of the manufacturer to apply the corresponding standards — whether separately specified or incorporated in the product standard — in their totality.

Certificates issued following assessment by independent certification organizations or claims of compliance by a manufacturer with any part of 'SO should cleatly identify the documents used by the manufacturer and provide or reference evidence of technical equivalence as applicable. Annex A gives examples. Quality system 1S0 does not specifically require 2 quality management system.

ISO , Clause 6, identifies those elements that could be considered as complementing if a quality management system were to be adopted. Some of the records generated as part of this system require updating at periodic intervals.

These include calibrationvalidation records and welder qualification records. Manufacturers who operate quality management system conforming to ISO are expected to have a documented system in place covering thoso elements identified in ISO , Clause 6. The effectiveness of the welding control system will depend o a large extent on the input from top-level management and their role in monitoring performance end implementing action when weaknesses are detected.

Applying management review and internal audit ensures top management involvement in the welding control system and enables the monitoring of performance and introduction of measures to overcome identified deficiencies, Figure 1 provides a summary of critical measures in the welding contvol system to assist management review of the performance of the welding control system.

The level selected wil depend on the nature of the product being. In ISO 1, itis stated that the standard can be applied in a variety of industrial situation. Such products would be manufactured from conventional materials where the weldabiily is known and the precautions to be taken to ensure mechanical performance and defact-avoidance are well documented.

This is Heeduse there can be different levels of complexiy in the design, materials and fabrication processes in any product group. By such means, a manufacturer can apply the comprehensive qualty requirements to those products where that comprehensive level is applicable, while applying the requirements Of the standard of elementary parts to products where these are more appropriate.

Further comments relate to the manufacturer's organization, the implementation in an SO environment and, finaly, individual elements of the control. For such manufacturers. ISO should not incur major change or cost. However, some manufacturers may require more significant action, for fone or more of the following reasons. Where such actions become necessary, it should be noted that ISO reflects good practice in the manufacture of products where welding is an important production process.

Compliance with ISO confers confidence for the manufacturer and the customer alike that the product will be manufactured properly and should not suffer premature failure during service life es a result of manufacturing deficiencies, provided a suitable programme of inspection and maintenance is undertaken.

Such controts should specify what itis that is to be controlied, how it is controlled if necessary, by reference to one or more procedures or standards , who has been allocated tasks and responsibilities in the control system, and how individual aspects of the control system are to be reported and documented. Where a particular activity is not within the range of production activities, e. Examples of documentation that manufacturers have found useful for their control systems are given in Annex A.

The steps are summarized in Table 2. The same general methods for welding procedure qualification see 9. This report normally Includes a record of the critical NDT parameters used during tho test. In some cases, however, such as when cutting sensitive materials, for which experience fs limited or where there is a risk of hard zones at the cut edges that could be harmful inthe final product, documented instruction may be necessary.

Some typical situations are oullined in Table 3, which illustrates the principles. Each company factories, each having a toar of welding coordinators factories, seen ne mpany or fectery manager Jor factory would normally consider all other companies oF responsible to each company oF factory management. Welding coordination according to ISO should be specified fer this activity. Product inspections may also be undertaken in conjunction with the manufacturer, Sub-contractors providing associated services, such as PWHT, NOT or inspection, may be audited if they do not have appropriate cerifcation for their activities and qualified personnel from industry-related schemes.

More extensive supervision and surveillance may become necessary i the intial audits reveal excessive non-conformance. When contractual or legal requirements specify a particular part of ISO , sub-contractors should comply with that level or higher. It should be noted that welding Coordination is usually performed by various categories of perscvael, many of whom are not traditionally considered to be part of the welding technology team, The following points are highlighted, a Large organizations performing extensive and complex welding activities will usually employ a number of persons who deal exclusively with the control of welding.

Those persons can have titles such as welding engineer or welding technologist and are normally recognized 2s full-time welding coordinators. In such cases, the manufacturer should ensure ths: the welders and welding operators have the necessary knowledge and competence, Control of inspection and testing activities that are also welding coordination activities are usually performed by persons bearing lilles such as welding inspector, NDT engineer ot quality manager.

However, in smaller organizations, such activities may be allocated to foremen or other personnel. Within the system, each control activity, e. ISO identifies requirements for each element of welding contro. It must be emphasized that the qualification needed for each welding coordinator is a consequence of the way in which the manufacturer has allocated tasks and responsibilities in his organizational stucture. The responsible welding coordinator has a overall responsibilty for monitoring welding activities and for taking action when welding has not been correct!

The manufacturer would be expected. The three levels according to ISO and those according to ISO are correlated for some, but not forall applications. Table 4 illustrates correlation where only one of the factors a. It should be noted that many manufacturers will have to take more than one factor into consideration when specifying the qualfication and experience required of the responsible welding coordinator s , nevertheless, the tabie ilustrates the principles to be followed.

It is separately recommended that welding coordinators have appropriate manufacturing experiance. It should be noted that the educational requirements and duration of the training course for the international welding engineer IWE diploma are more stringent than those for the intemational welding technologist WT , and likewise between the IWT and the international welding specialist IWS.

A university engineering degree fr equivalent is required for IWE and, because of this, a manufacturer may select the IWE qualification ia place of lower leve!

In such cases, these requirements must be met by the manufacturer. However, allows welding coordination to be sub-contracted, while the responsibility for maintaining compliance with ISO remains with the manufacturer.

Their concepts 5 welding are the subject of 1SO Ch the one hand, calibration is the process whereby the item of equipment is tested at intervals against easurement slandards whose accuracy in terms of closeness of agreement to the true measurement is kxown, so that the accuracy of the instrument under test for a given level of uncertainty can be determined. This can be done by using a calibrated instrument or measurement andard to show that an instrument under test is providing a satisfactory output based on the instrument tings or instrument gauges.

As general tule, inspection and test measuring equipment is always calibrated Ir general, calibration or validation is also required for temperature measurement, e. In other circumstances, where the tongue tester was used as a meter to adjust the equipment to obtain the right current in accordance with a welding Pracedure specication, the tongue tester would provide verification thal the right current level had been achieved.

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