Power Transmission Tower: Manufactured to Drawing Specifications; Custom Fabrication of 10 kV–750 kV Angle Steel Towers and Single-Tube Towers

Power transmission towers are steel structures designed to support the conductors and ground wires of high-voltage overhead power lines. Xinlian provides build-to-print services: The buyer or its design institute provides tower drawings and structural calculations, and Xinlian is responsible for manufacturing according to the drawings, hot-dip galvanizing, trial assembly, and document delivery. This covers 10 kV–750 kV, with tower types including straight towers, tension towers, angle towers, terminal towers, and crossing towers; structural forms include angle steel towers and single-tube towers. Manufacturing complies with GB/T 2694-2018; for overseas projects, manufacturing is conducted according to the buyer’s drawings and specified standards, with Xinlian cooperating with third-party inspections.

I. Who It Is Suitable For and What Problems It Solves

Suitable for: EPC contractors, power company procurement departments, and transmission line general contractors who already have tower drawings and structural calculations and are seeking a manufacturer that offers stable build-to-print quality, in-house galvanizing, and a complete set of documentation.

Key Conclusion: Under the “manufacturing to drawings” model, design responsibility lies with the buyer, while manufacturing responsibility lies with Xinlian. Xinlian does not undertake tower design or code conversion, but is responsible for accurately implementing the cross-sections, joints, bolts, and galvanizing requirements specified in the drawings onto the finished products. Xinlian also provides material certificates, galvanized coating thickness reports, bolt traceability records, and test assembly records to support EPC acceptance. What the buyer needs to confirm is not “whether Xinlian can design,” but “whether Xinlian can consistently manufacture according to my drawings and deliver all required documentation.”

You will receive: ① Tower bodies and components manufactured according to the buyer’s drawings; ② Measured hot-dip galvanized coating thickness and Material Test Certificates (MTCs); ③ A documentation package to support acceptance (bill of materials, galvanizing reports, bolt traceability records, and trial assembly records).

II. Products and Scope of Work

III. Manufacturing Parameters and Quality Control

Manufacturing Scope: Xinlian manufactures according to the buyer’s drawings and makes no judgment regarding the design rationality or code compliance of the drawings. If the buyer’s drawings reference standards such as IEC 60826, ASCE 74, or EN 50341, Xinlian shall comply with the material, dimensional, galvanizing, and inspection requirements specified in the drawings; Xinlian does not claim to hold EN 1090 factory certification or the CE mark; if required by the project, the party responsible for certification and the timeline must be clearly defined prior to contract signing. Xinlian can provide compliance support materials such as Material Test Certificates (MTCs), galvanized coating thickness reports, and welding procedure specifications to facilitate third-party inspections designated by the Buyer (e.g., SGS, Intertek, TÜV).

IV. Core Advantages

1. In-house Galvanizing: Located in Guangchuan, Hengshui, Hebei—known as the “Hometown of Steel Towers”—raw materials and hot-dip galvanizing are completed locally, ensuring controllable zinc coating consistency and prompt response to re-galvanizing requests.

2. Manufacturing According to Drawings, No Design Overreach: Clear manufacturing responsibilities make this approach suitable for EPC projects with drawings provided by existing design institutes, thereby reducing disputes over design liability.

3. Complete Delivery Documentation: We provide material lists, MTCs, galvanized coating thickness reports, bolt lot number traceability records, and trial assembly records to support acceptance testing—not merely the delivery of steel.

4. Project-Based Production Scheduling: We support phased production scheduling for bulk orders; delivery times depend on tower type, quantity, galvanizing production schedule, and drawing approval cycles.

V. FAQ

Q1: Can you perform structural calculations or ensure compliance with standards?

A: No. For power transmission towers, Xinlian only supports fabrication based on provided drawings; design is the responsibility of the buyer or their design institute. Xinlian manufactures according to the drawings and does not undertake tower design, wind load calculations, or standard conversions between GB, IEC, ASCE, and EN.

Q2: What information should be included in the drawings?

A: We recommend providing tower type drawings, a component list and material schedule, bolt specifications and grades, galvanizing requirements (zinc coating thickness or applicable standards), packaging and marking requirements, and whether trial assembly is required. The buyer specifies the drawing standards, and Xinlian manufactures according to the drawings.

Q3: How thick is the galvanized coating? Which standard does it comply with?

A: We comply with GB/T 13912-2020: ≥86 μm for components ≥5 mm thick, and ≥65 μm for components <5 mm thick. If the drawings require ISO 1461 / ASTM A123 (minimum 85 μm for components ≥6 mm thick), Xinlian will ensure compliance through actual measurement and benchmarking. For highly corrosive coastal environments, increased thickness or additional coatings may be evaluated; this must be clearly specified in the drawings or technical agreement.

Q4: Do you have EN 1090 or CE certification?

A: We do not currently claim to hold EN 1090 factory certification or the CE mark. If required by the project, the certification path, responsible parties, and timeline must be clarified prior to contracting; Xinlian can provide compliance support materials such as MTCs, galvanizing reports, and welding procedure specifications to facilitate third-party inspection.

Q5: What delivery documents can you provide?

A: Bill of Materials (BOM) and component list, MTC, galvanized coating thickness reports, bolt lot number traceability records, trial assembly records (if required), and a packaging marking plan with bundles organized by installation sequence.

VI. CTA

If you already have transmission line tower drawings and are looking for a manufacturer that can produce according to drawings, handle galvanizing in-house, and provide a complete set of documentation, please send the following information to receive a preliminary manufacturing assessment within 48 hours:

1. Drawings and Lists: Tower type drawings, component list, bill of materials, bolt specifications;

2. Technical Requirements: Galvanizing requirements, applicable standards, and whether trial assembly or third-party inspection is required;