根据焊接方法的不同，其对应的焊接工艺也有所不同。焊接工艺评定（Welding Procedure Qualification Record，简称WPQR）就是为验证所拟定的焊件焊接工艺的正确性而进行的试验过程及结果评价。通过焊接工艺评定，能够为正式制定焊接工艺指导书或焊接工艺卡提供可靠的依据。然而，在焊接工艺评定合格的同时，还要求焊工能够适应不同焊接方法、焊接位置、母材、焊接材料，因此对其进行焊工技能评定（Welder Performance Qualification，简称WPQ）是证明焊工资质能力的有力手段。焊接认证适用于下面标准： AWS，ASME 美标， AS澳标，EN/ISO欧标。

• Welding invigilation – our accreditations enable us to witness weld procedure qualification records and welder qualification tests in accordance with British, European and American standards.
• EN/ISO 17025 accredited laboratories – our ISO 17025 accredited laboratories offer a wide variety of metallurgical, mechanical, chemical analysis, pressure and corrosion testing services.
• Visual welding inspection – we employ certified and experienced welding inspectors, who can perform visual and dimensional checks on pipe and structural welds.
• Metallurgical testing – we perform in-depth analysis of steel samples to look for micro-structural defects and different phases present in duplex and super duplex as well as numerous other welded materials.
• Mechanical testing – we conduct a wide variety of mechanical tests on welded samples. Also known as destructive tests, they can be used for design purposes and to determine if the variables used to produce a welded joint are acceptable. Mechanical testing allows us to determine a material’s properties, including yield strength, ultimate tensile strength, ductility, notch (impact) toughness, fracture toughness and hardness.
• Butt weld testing – we can perform a range of testing on a butt weld joint to determine the quality, strength, hardness and ductility of the weld. Some of the tests we perform are NDT, tensile tests, bend tests, impact tests, macro examination and hardness tests. These tests, as well as some others, can be used to determine the acceptability of a weld procedure or a welder qualification test.
• Fillet weld testing – we can determine the quality of a fillet weld joint by performing NDT and mechanical testing. Macro examinations and fillet fracture tests give a good view of profile, fusion and penetration, and reveal whether there are any imperfections, such as porosity or inclusions, in the weld. These tests are used to test the welder’s ability to weld a fillet weld.