Contrôle qualité

Liste de contrôle qualité des joints en caoutchouc

# Liste de contrôle qualité des joints en caoutchouc\n\n## Guide pour acheteurs B2B\n\nCet article aide les acheteurs techniques, installateurs, distributeurs et clients OEM/ODM à préparer les informations nécessaires avant une demande de prix.\n\n## Raccords de tuyauterie: Liste de contrôle qualité des joints en caoutchouc\n\nNe choisissez pas seulement par nom de produit. Vérifiez la dimension, la pression, la norme de raccordement, le matériau, le fluide, la température, la position de montage, la quantité et le plan.\n\nLes produits concernés peuvent inclure joints de dilatation en caoutchouc, joints de démontage, raccords de tuyauterie, adaptateurs à bride, compensateurs métalliques et manchons étanches.\n\n## RFQ\n\nPour un devis plus rapide, envoyez DN, pression, norme de bride, matériau, fluide, température, quantité, plan ou photo.\n\n- DN / size\n- pressure rating\n- connection standard\n- material\n- working medium and temperature\n- quantity\n- drawing, photo or specification\n\n## Quality and Packing\n\nAvant expédition, vérifiez l’aspect, les dimensions, les faces de raccordement, les accessoires, l’étiquetage et l’emballage. Les essais doivent être confirmés avant production.\n\n## Project Inquiry\n\nPour votre projet, envoyez dimensions, pression, norme de raccordement, matériau, fluide, quantité et plan afin de confirmer la configuration.

常见问题

?Does every rubber expansion joint require hydrostatic testing?

Not necessarily. Whether testing is performed on every unit, by batch sampling or under another agreed method depends on the product specification, purchase contract and approved inspection plan.

?Which dimensions should be checked before shipment?

Typical checks include nominal size, bore, face-to-face length, flange outside diameter, flange thickness, bolt-circle diameter, number and diameter of bolt holes, sealing surface and connection alignment.

?Is visual inspection enough to confirm product quality?

No. Visual inspection identifies surface defects, but quality control should also cover raw materials, internal reinforcement, curing records, metallic components, dimensions, traceability and required testing.

?How can the specified elastomer compound be verified?

Verification should use controlled raw-material records, batch identification, production documentation and agreed material checks. Colour or surface appearance is not sufficient.

?When should third-party inspection be specified?

Third-party inspection, witness points and special testing should be stated during the RFQ or order stage because they may affect cost, production planning and delivery time.

?Which quality documents can be supplied with the shipment?

Depending on the order, the shipment may include approved drawings, dimensional records, visual inspection reports, test reports, material documents, product photographs, packing lists and third-party inspection reports.