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Zibo Wel-fit Controls the entire manufacturing process. All fittings are subject to strict in-process inspection at each stage of the production process, from starting material handling to finished product shipping. They are visually examined for conformity to Zibo Wel-fit company specifications and checked and tested in accordance with applicable ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, officially certified test agents can be called in to witness the inspection procedures. |
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| Zibo Wel-fit material inspections
are carried out as follows. 1. Dimensional Inspection Dimensions are checked at each end of the purchased material. 2. Visual Inspection Surface check to ensure that material is correct and suitable for production of fittings. 3. Collating Tests are done to ensure that the chemical composition and tensile properties of the described items are exactly as shown in the material certificates. |
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Zibo Wel-fit buttwelding fittings are manufactured from carefully selected materials of the finest metallurgical quality on well-controlled jigs, tools and molds. In order to ensure that all fittings meet quality specifications, the following in-process inspections are performed. |
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-Visual Inspection |
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| Zibo Wel-fit buttwelding fittings
are subject to the following final inspections before they are packed and
delivered. 1. Visual Inspection Both internal and external surfaces are checked to confirm they are smooth and do not bear any harmful defects. 2. Dimensional Inspection Done to ensure that all fittings are in conformity with dimensional tolerances of relevant Codes and standards. |
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| 3. Special Inspection Non-destructive examinations and mechanical tests are performed as per customer's Request. 4. Certification Zibo Wel-fit inspection certificates are issued in accordance with DIN 50049/EN10204 unless otherwise requested by customers. |
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Zibo Wel-fit buttwelding fittings subject to this inspection are made from starting materials stipulated by the regulations of the inspection body, e.g. BV, LR, DNV, SGS, etc. The staring materials and finished products are inspected for appearance, dimensions, and conformity to designated codes and specifications. The inspection body witnesses and certifies the inspections and issues certificates or report of findings to customers. |
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