OEM & Custom Orders

Tongjiang accepts orders to non-standard specifications through a defined intake process, not an ad hoc one. This page covers what can be customized, how custom rope from a buyer's own drawing gets built, and what information the sales team needs to quote it.

For general order terms like minimum quantity and payment, see Export & Logistics.

Customization at a Glance

What Can Be Customized

Tongjiang manufactures to non-standard specifications across seven parameters: construction, diameter, core type (fiber, steel, or plastic-impregnated steel core), surface coating (bright or galvanized), lay type (regular or lang lay), lay direction (left or right lay), length, and marking. Diameters from 6mm to 80mm are available across the general product line, with larger diameters available for mining and oil-drilling applications on request.

Several of Tongjiang's most requested constructions already reflect a specific buyer requirement rather than a single generic default. The EPIWRC designation adds a plastic-impregnated core to a standard base construction for buyers who need extra corrosion resistance, and PWRC adds a full-rope plastic coating for extra crush resistance. Both show up repeatedly among Tongjiang's bestselling products, which suggests a custom specification is often closer to a standard order with one parameter changed than an unusual one-off design.

Custom Rope From Buyer Drawings

For guy wire and other application-specific rope, Tongjiang manufactures directly from a buyer's own engineering drawings rather than only from its standard construction list. The buyer specifies the design requirements, and Tongjiang manufactures to that specification, a process used for applications where no standard catalog construction fits. Guy wire is the most common drawing-based application across Tongjiang's product range, used on crawler cranes, tower cranes, and truck-mounted cranes where the anchoring requirement is specific to the equipment and job site rather than a standard catalog item.

How the Naming Convention Works

Tongjiang products follow a structured code, for example TG 40mm 6x36WS IWRC 1770 U sZ. Each segment carries specific information: brand, diameter, construction, core type, minimum breaking grade, surface finish, and lay direction. Buyers ordering a custom specification can use the same structure to confirm exactly what they are requesting, reducing the chance of a mismatched order.

The OEM Order Process

Before production begins on any order, standard or custom, buyers complete a structured technical intake covering application, length and tolerance, nominal diameter, construction, grade or brand, core type, wire surface coating, lay type, lay direction, minimum breaking force, end-finish requirements, packaging requirements, marking requirements, and any third-party certification requirement such as LR, DNV, or ABS. That checklist is what Tongjiang's sales team uses to confirm a custom order matches the application before it goes into production.

How a Custom Order Moves Through the Factory

A custom order follows a defined sequence rather than an ad hoc process. The buyer completes the technical intake checklist covering application, dimensions, construction, and any certification requirements, and Tongjiang's technical team reviews the specification and issues a quote. Once the buyer confirms, standard order terms apply: a deposit, typically 30% by telegraphic transfer, starts the production schedule (see Export & Logistics for full payment terms). Production is then scheduled against the factory's current load rather than a fixed lead time, since custom specifications are not held in standing inventory the way catalog constructions are. Once manufactured, the rope goes through the same tensile testing, and torque and rotation verification for rotation-resistant constructions, that every Tongjiang rope undergoes before shipment (see Factory & Quality for the full testing process).

Frequently Asked Questions

What specifications can TJ Steel Rope customize on an order?

Construction, diameter, core type, surface coating, lay type, lay direction, length, and marking can all be customized. Diameters from 6mm to 80mm are standard, with larger sizes available for mining and oil-drilling applications.

Can TJ Steel Rope manufacture rope directly from a buyer's engineering drawing?

Yes, for guy wire and other application-specific rope. The buyer supplies the design requirements and Tongjiang manufactures to that specification, which is common for applications with no standard catalog equivalent.

Is there a minimum order quantity for custom or OEM specifications?

Tongjiang's standard 1,000-meter minimum order quantity applies to most custom specifications as well as standard catalog orders. Buyers considering a smaller custom run should confirm feasibility with the sales team directly, since requirements vary by construction and diameter.

What information does TJ Steel Rope need to quote a custom order?

Application, length and tolerance, nominal diameter, construction, grade, core type, wire surface coating, lay type and direction, minimum breaking force, end-finish, packaging and marking requirements, and any third-party certification requirement such as LR, DNV, or ABS. Providing this upfront speeds up the quoting process.

How does TJ Steel Rope's product naming convention work?

A code such as TG 40mm 6x36WS IWRC 1770 U sZ encodes brand, diameter, construction, core type, minimum breaking grade, surface finish, and lay direction in a fixed order. Buyers can use the same structure when specifying a custom order to avoid ambiguity about what is being requested.

What's the difference between a standard catalog order and a custom OEM order?

A standard catalog order draws from a construction Tongjiang already manufactures and often holds in inventory, so it can move faster. A custom OEM order requires the full technical intake checklist before production is scheduled, since the specification, whether a non-standard core, coating, or a rope built from a buyer's own drawing, has to be confirmed before manufacturing begins rather than pulled from stock.

What does a typical custom specification look like at TJ Steel Rope?

Often it is a standard base construction with one parameter changed for the application: a plastic-impregnated core added for corrosion resistance (the EPIWRC designation), a full-rope plastic coating for crush resistance (PWRC), or a non-standard diameter or length. Several of Tongjiang's bestselling products are exactly this kind of adapted specification rather than an unusual one-off design.