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1、ISO 3834Introduction to welding system certification:
ISO 3834Welding system certification is aimed at the special process of welding, which requires enterprises to combine design, process, production and quality assurance to form a mature system, so as to ensure the final quality demand of products.ISO 3834Certification is based onISO 9000On the basis of and combined with the actual application conditions of welding, the welding quality requirements that should be included in the welding quality assurance system are described.ISO 3834Welding certification in e.g. steel structuresEN 1090CertificationEN 15085Certification is a mandatory quality control system.
ISO 3834It consists of three parts:
The first part is the selection criteria of the corresponding quality requirement level, that is, according to the product standards, specifications, rules or contracts, select the level of quality requirementsISO 3834-2、ISO 3834-3orISO 3834-4。
The second part is the quality requirements of different levels, which are:
ISO 3834-2Complete quality requirements
ISO 3834-3Standard quality requirements
ISO 3834-4 Basic quality requirements.
Where, when the manufacturer meets a specific quality level (e.gISO 3834-2）When, it can also be regarded as meeting all lower quality level requirements (e.gISO 3834-3orISO 3834-4）No further verification is required.
Part III（ISO 3834-5）Documents required to meet the quality requirements of each part, i.e. confirmation of conformityISO3834-2、ISO3834-3orISO3834-4Documents required for quality requirements.
ISO 3834Audit requirements for
1.Technical review and requirement review;2.Subcontracting;3.Welding personnel;4.Inspection and test personnel;5.Equipment;6.Welding and related activities;7.Welding consumables;8.Storage of base metal;9.Post weld heat treatment;10.Inspection and test;11.Nonconformities and corrective measures;
12.Calibration and calibration of test, measuring and inspection equipment;13.Identification and traceability;14.Quality records.
2、steel structureEN 1090authentication
steel structureCEauthentication-EN 1090Introduction:
EN 1090yesCEBuilding materials regulations in certificationCPR（Regulation (EU) No 305/2011）Standards for steel structures under. This standard is applicable to2012year9month1Implemented on and2014year7month1The old standards were completely abolished,EN 1090Start enforcement. EU regulations in2014year7month1After the th, all steel structures entering the EU market must be obtainedEN 1090Certificate before being allowed to be sold in the EU market.
EN 1090The standard has three parts:
1.EN 1090-1: 2009 + A1: 2011Steel and aluminum structures - Part 1: basic requirements for conformity assessment of structural components (directive standard)
2.EN 1090-2: 2008Steel structure and aluminum structure part 2: technical requirements for steel structure (non directive standard)
3.EN 1090-3: 2008Steel structure and aluminum structure part 3: technical requirements for aluminum structure (non directive standard)
4.EN 1090In building materialsCPRUnder the regulationsSystem 2+Category, mainly including factory production control, initial type test, continuous supervision and evaluation, etc.
Basic requirements for factory production control:
human resources infrastructure Structural design Component
Component specification Product evaluation Nonconformity control Document control
Initial type inspection (if applicable):
Dimensional and shape tolerances Weldability fracture toughness /Impact resistance
fatigue strength Fire resistance Fire reaction
Discharge of radioactive substances Durability Load carrying capacity
EN 1090Key points of certification
EN 1090Certification is the audit of steel structure enterprise system. It mainly assesses the quality control ability of the enterprise. It mainly includes: welding personnel qualification, material certificate, quality control documents, establishment of welding system and product testing.
The general points requiring certification are as follows:
a) Establish factory production control systemFPC； reference resourcesEN 1090-1, 6.3, P19;
b) Select execution levelEXC1~4； reference resourcesEN 1090-2, A.3, P 107;
c) Verification of material certificate; reference resourcesEN 1090-2, 5, P25,
d) Establish welding system; reference resourcesEN 1090-1, Table B.1, P26;
e) Determination of product performance parameters; reference resourcesEN 1090-1, ZA.1, P30;
f) Sign declaration of conformity,useCESign.
FPCKey points of audit:
a) General requirements: inISO 9001Establish a factory management and control system based on the document requirements to ensure that the products put on the market are consistent with the performance parameters announced by the manufacturer.FPCThe system shall include procedure documents, inspection procedures, product testing, sampling and verification records. The inspection results are used to control product quality, production process documents and production flow chart.
b) Personnel: welder certificate and welding operator certificate conforming to EU standards.
c) Equipment: Measurement and calibration of weighing equipment, inspection equipment and test equipment, and control of procedure documents.
d) Structural design process: evaluate the design calculation, and the evaluation complies with European standards.
e) Constituent material(raw material): material certificates or material files, such as:3.1Certificates,2.2Documents (inside the factory) or issued by a third party3.2Certificate（EN 10204）。
f) Material specification: give basic performance requirements Basic performance verification . record.
g) Final product inspection.
h) Handling process of nonconforming products.
i) Provided inside the factoryInitial Type Testing Report(initial type test report), which can be carried out in its own factory or in a third-party laboratory.
j) The qualification certificate of welding system includes welding process（WPQR/WPAR）, base metal, executive grade, standard. Provide welder manual, etc.
Requirements of each executive level on welding system:
Execution levelexc Welding quality control
1 ISO 3834-4: basic quality requirements
2 ISO 3834-3: general quality requirements
3 ISO 3834-2: complete quality requirements
4 ISO 3834-2: complete quality requirements
3、Rail vehicle weldingEN 15085authentication
EN 15085It is a set of welding certification system for rail vehicles and vehicle components, which is widely popular in the rail transit industry,EN 15085Series standard from2008year4Since its formal implementation in June, it has gradually replaced the former GermanyDIN 6700Series of standards, becoming the authoritative certification system in this field.EN 15085Certification puts forward detailed and standardized requirements for enterprise welding quality, qualification of welding managers and welders, design structure, production process management, product quality supervision and inspection, etc.
EN 15085The welding quality system standard is a standard for the welding quality of rail vehicles and their components5Components:
1.EN 15085-1(general)
2.EN 15085-2(quality requirements and qualification certification of welding enterprises)
3.EN 15085-3(design requirements)
4.EN 15085-4(production requirements)
5.EN 15085-5(inspection, test and documentation)
EN 15085Certification level and requirements:
Certification level Weld quality grade quality requirement Requirements for welding responsible personnel
CL1 CPA~CPD EN ISO 3834-2 A
CL2 CPC1~CPD EN ISO 3834-3 BperhapsC
CL3 CPD EN ISO 3834-4 No requirement
CL4-No direct welding-EN ISO 3834-3-CL1: A；CL2: BorC
Responsibility requirements of Welding Supervisor（ISO 14731）：
The organizational relationship with welding enterprises enables him to perform completely unlimitedISO 14731And the tasks and responsibilities in this standard. To this end, these personnel must have the right to guide and decide independently of the actual pressure of production technology.
Quality grade of weld:
1.The designer shall determine the quality grade of the weld after calculation according to the bearing state and safety requirements of the product；
2.The weld quality grade determines the defect quality grade and weld inspection grade of the weld. The weld inspection level determines the inspection method to be adopted, and all welds must be visually inspected（VT）；
3.The inspection of welds shall be guided and supervised by the person in charge of welding.
Personnel certification
1.Welders and operators: according to the product weld requirements, according toISO 9606orISO 14732The welder shall be tested according to the standard, and the valid period shall be subject to the appropriate regulations selected by the supplier；
2.Inspector: certify according to the standard and work under the guidance of the person in charge of welding；
3.Personnel assessment must be carried out by the person in charge of welding.
Process quality requirements
1. Raw material requirements: base metal and welding material
2. Supervision and inspection of welding
3. Quality record
