Factory & Quality

Tongjiang's Nantong facility occupies 33,536 square meters and runs the complete production sequence for the company's wire rope range: wire drawing, strand twisting, and rope closing, across 65 major pieces of equipment. Every stage of that process sits under a certified management system, not an internal standard the company set for itself.

The sections below cover how rope is made, how it is tested, and what the certifications behind that process actually say, with certificate numbers and expiry dates included so buyers can verify each one.

Facility & Quality at a Glance

Production Process

Production runs across three core stages: wire drawing, strand twisting, and rope closing, using 65 major pieces of equipment including servo direct-drive straight-line drawing machines and planetary stranding machines. Tongjiang also maintains an independent R&D division with in-house testing and fatigue-qualification equipment, including proprietary torque and rotation testing gear used to verify rotation-resistant constructions before they ship. The company keeps roughly 4,000 tons of finished-goods inventory on hand year round to support faster dispatch on standard catalog constructions.

Quality Management System

Every rope moves through a six-stage quality process: quality planning and standards, incoming material inspection, in-process inspection with first-article confirmation and operator self-checks, final and outgoing inspection before shipment, formal Material Review Board disposition for any nonconforming product, and continuous improvement through internal audits and management review. This process operates under ISO 9001:2015 certification (GB/T 19001-2016 equivalent, Certificate No. 18122Q11736R1M), first issued January 17, 2022, renewed January 13, 2025, and valid through January 16, 2028.

Environmental and Energy Management

Tongjiang's Environmental Management System is certified to ISO 14001:2015 (Certificate No. 18122E20706R1S, valid through September 29, 2028), and its Energy Management System is certified to ISO 50001:2018 (Certificate No. 21125En10013R0S, valid through October 9, 2028). The energy certification includes audited performance data: comprehensive energy consumption per unit of product measured at 56.11 kgce per ton across 2024, improving to 55.94 kgce per ton for the January to August 2025 audit period.

Occupational Health and Safety

Tongjiang's Occupational Health & Safety Management System is certified to ISO 45001:2018 (Certificate No. 18122S10569R1S, valid through September 29, 2028), covering the safety management activities involved in steel wire rope production at the Nantong facility.

Testing and Traceability

Every rope is tensile tested against its declared minimum guaranteed breaking force before shipment, and rotation-resistant products go through a dedicated torque and rotation verification procedure on the company's own testing equipment. For rope intended for marine use, Tongjiang holds a Certificate of Works Approval from China Classification Society (No. JS24PWA00203_01, valid through December 17, 2029), covering single-layer rope from 10mm to 80mm and rotation-resistant rope from 10mm to 52mm at steel wire grades from 1570 to 2160 N/mm². Test reports, mill certificates, and product quality certification documents are available to buyers who need them for their own procurement records.

Frequently Asked Questions

What is TJ Steel Rope's production capacity and facility size?

The Nantong facility covers 33,536 square meters and runs three core production stages (wire drawing, strand twisting, rope closing) across 65 major pieces of equipment. Tongjiang also maintains roughly 4,000 tons of finished-goods inventory year round to support faster dispatch on standard catalog constructions.

What certifications does the factory hold, and are they current?

Four current CICC-issued certifications: ISO 9001:2015 (Quality, valid through January 16, 2028), ISO 14001:2015 (Environmental, valid through September 29, 2028), ISO 45001:2018 (Occupational Health & Safety, valid through September 29, 2028), and ISO 50001:2018 (Energy, valid through October 9, 2028). The factory also holds a China Classification Society works approval for marine-use wire rope, valid through December 17, 2029.

How does TJ Steel Rope test rope before it ships?

Every rope is tensile tested against its declared minimum guaranteed breaking force before shipment. Rotation-resistant constructions go through an additional torque and rotation verification procedure on the company's own testing equipment. Any nonconforming product is isolated and reviewed through a formal Material Review Board process rather than shipped and dealt with later.

What is TJ Steel Rope's energy efficiency performance?

Under ISO 50001:2018 certification, Tongjiang's audited energy performance shows comprehensive energy consumption per unit of product falling from 56.11 kgce per ton in 2024 to 55.94 kgce per ton in the January to August 2025 audit period, a measured reduction rather than a stated goal.

How is a quality problem handled if one is found?

Nonconforming product is identified, isolated, and reviewed through a formal Material Review Board process, with disposition as rework, scrap, or a documented special release. The root cause is traced and fed into corrective and preventive action, with internal audits and management review checking that the fix holds over time.