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.
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.