SPECIFICATIONS

3. Quality management3.1 WeldingOur welding processes are subject tothe following criteria:1. We are recognised manufacturer inaccordance with AD-Merkblatt HPO/TRD 201/DIN EN 729-2.2. Our processes conform to AD-MerkblattHP 2/1.3. Our operations are supervised by arecognised welding expert.4. We only employ welders with a HP 3certificate.3.2 Material certificatesAll pipes, flanges, elbows and weldedfittings have a works certificateaccording to EN 10204 - 3.1.3.3 Raw material checksLining materials are only procured withmaterial certificates WAZ 2.2 from manufacturerscertified acc. to ISO 9001.3.4 Optical and dimensional checksIn addition, our own laboratory continuallychecks and records the physical data ofsemifinished products from the productionline. The dimensions of all pipes and fittingsare checked visually.3.5 SparktestsAll non-conductive lined pipes andfittings undergo a 30.000 Volt spark test tomake sure the lining is not porous.3.6 Hydrostatic testsThe hydrostatic test is carried outwith the 1,43-fold of the nominal workingpressure.3.7 MarkingIn accordance with DIN 2874, everypipe and fitting can be marked on theflange's circumference as follows:Manufacturer's signProduction lotLining materialDate of productionCE marking (if applicable)Additional markings – e.g. materialno. – are available upon customer demand.3.8 Certificates