| Raw Material Receiving Inspecion (steel bars and wires) | |||
| Visual inspection (steel code, heat no., surface finish, quantiy, etc.) | Dimensional check (sample percentage) | Mechanical property retest and chemical composition check by samples per heat or batch | Materials acceptance and inventory login |
| Bar Cutting | |||
| Check size, heat no., cutting length design | Cut length measurement | Tagging of cut bars in bucket | |
| Links Making (bending, welding, trimming and/or forming) | ||||
| Welding parameters setting | Electrode cleaning | Welding records/curve check | Trimming smoothness | Sample links dimensional check |
| Heat-treatment | |||
| Quenching and tempering parameters setting | Furnace calibration | Temperature monitor | Heat-treatment records/curves review |
| Manufacturing Force Testing to 100% Chains | |||
| Proof machine calibration | Force setting per chain size and grade | Loading of full chain with records | |
| Links & Chains Dimensional Check | ||||
| Caliper calibration | Links measurement frequency | Chain length / gauge length measurement with preset tension / force or hanged vertical | Dimensional records | Out-of-tolerance links marking and rework |
| Surface Finish Check and Grinding | |||
| Links surface visual inspecton for free of cracks, dents, overcut and other defects | Repair by grinding | Links determined unacceptable for replacement | Records |
| Mechanical Property Tests (breaking force , hardness , V-notch impact , bending , tensile , etc as applicable) | ||||
| Breaking force test per applicable standard and client's specs | Hardness test on link surface and/or cross section per standards and client's rules | Other mechanical tests as required per chain type | Test failure and retest, or chain failure determination per standards and client's rules | Test records |
| Special Coating and Surface Finishing | |||
| Special coating fnish per client's specs, including painting, oiling, galvanization, etc. | Coating thickness check | Coating report | |
| Mechanical Property Tests (breaking force , hardness , V-notch impact , bending , tensile , etc as applicable) | ||||
| Breaking force test per applicable standard and client's specs | Hardness test on link surface and/or cross section per standards and client's rules | Other mechanical tests as required per chain type | Test failure and retest, or chain failure determination per standards and client's rules | Test records |
| Packing and Tagging | |||
| Packing & tagging means per client's specs and applicable standards | Packing material (barrel, pallet, bag, etc.) suitable for lifting, handling and sea transportation | Photo records | |
| Final Data Book and Certification | |||
| Per client's specs and order terms | |||