Issuance of WPQR
LL-C (Certification) provides for issuance of accredited certifications of approval of Welding Procedure Qualification Records (WPQR). The requested certifications are issued after the completion of tests in accredited testing laboratories within short periods of time.
We are capable of performing most of the tests within 2 working days after the samples are received and results of the tests are communicated to the clients immediately after the test is completed. Under usual circumstances reports about the completed tests are sent electronically within one working day after the test completion.
Do not hesitate to approach LL-C (Certification) workers to make sure that your request is fulfilled in time.
Welding Procedure Qualification Records - WPQR
The issuance of an inspection certificate for the Welding Procedure Qualification Record (WPQR) or Welding Procedure Specification (WPS) is conditional on performance of a number of tests, such as visual inspection, radiographic testing (RT), ultrasonic testing or ultrasonic flaw detection (UT or UFD), magnetic particles testing (MT) and dye penetrant test (PT).
Another part is the application of suitable mechanical tests, e.g. tensile strength test of a welded joint, crosswise tensile test, lengthwise bending test, crosswise bending test, impact test.
Macroscopic, microscopic test and other assessments
Overall evaluation of the welded joint is completed with a macroscopic test, evaluation of hardness, checking of fracture behavior of a welded joint, impact strength, corrosion resistance, metallographic test, test of microstructure, determination of ferrite quantity - determination of the ferrite number.
ISO 3834-4:2005 (basic level of quality requirements)
- intended for the range of products with basic safety requirements, which are exposed to average static stress, products are made of normal materials of known weldability, mechanical stability of products is ensured.
ISO 3834 & EN 1090
The growth of the applicability of steel structures in construction increases the demand not only quality but also on the safety performance of welding work. Construction industry (steel building structures, bridge structures, etc.) is an area where manufacturers face significant demands on safety and quality of welded joints, which is necessary to declare the quality management system certification in welding processes according to ISO 3834:2005 & EN 1090:2007 .
LL-C (Certification) provides for exams of welders, soldering and welding operators subject to the authorization by CWS ANB (CZECH WELDING SOCIETY AUTHORIZED NATIONAL BODY). The examiners have appropriate professional qualification based on their education (IWE, EWE), many years of experience in the field and they have valid letters of appointment issued by CWS ANB. The issued authorizations and certificates of welder exams are valid worldwide.