Ningbo Suntech Power Machinery Tools Co.,Ltd.
Ningbo Suntech Power Machinery Tools Co., Ltd. Professional Manufacturer and Exporter of Electric Power Field
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Transmission Line Mast Galvanized Steel Lattice Tubular Guy Wire Guyed Tower
The steel tube tower structure has relative technical and economic advantages, and is suitable for transmission towers that bear large loads.
Applications:
In China, steel pipe profiles have also been used in 500kV double-circuit towers and four-pass towers on the same tower, showing its good performance and benefits. The steel pipe tower structure has been well developed in lines with different voltage levels due to its outstanding cross-section stiffness, good cross-section force characteristics, simple force, and beautiful appearance. Especially in large-span structures and urban power grid tower structures.
Specifications:
Transmission Line Steel Tower & Substation Structure- Goods description and major parameters
| No. | Description | Detailed Specification and Major design Parameters |
| 1 | Design Code | 1. Chinese National Standard: a. DL/T 5154-2002 Technical Regulation of Design For Tower and Pole Structures of Overhead Transmission Line b. DL/T 5219-2005 Technical Regulation for Designing Foundation of Overhead Transmission Line 2. American Standard: a. ASCE 10-97-2000 Design of Latticed Steel Transmission Structures b. ACI 318-02 Building Code Requirement for Structure Concrete |
| 2 | Design Software | PLS and MS Tower, SAP2000, AutoCAD, STW, TWsolid, SLCAD etc |
| 3 | Design Loading | As per requirement and specification by Clients worldwide. |
| 4 | Load test/destructive test | We can arrange it by Government authority if it is necessary and the cost of such kind of test is separately from the tower pricing. |
| 5 | Voltage | 33KV, 66/69KV, 110KV, 220KV/230KV, 330KV, 380/400KV, 500KV, 750KV, 800KV, 1000KV Transmission Line |
| 6 | Hot-dip galvanization | ISO 1461-2009, ASTM A123 |
| 7 | Steel Grade | 1. High strength low alloy structural steel: Q420B which is equivalent with ASTM Gr60 2. High strength low alloy structural steels: Q355B which is equivalent with ASTM Gr50 or S355JR 3. Carbon Structural Steel: Q235B which is equivalent with ASTM A36 or S235JR |
| 8 | Bolts and Nuts | Mainly ISO 898 grade 6.8 and 8.8 bolts for Both Chinese, ISO and DIN standard |
| 9 | Tower Type | Angular Towers, Tubular Towers, Guyed Mast, Monopole Tower |
| 10 | Tower Type | Suspension Tower, Tension Tower, Dead Tower, Substation Structure |
| 11 | Warranty | Tower structures: 30 years |
| 12 | Return Period | 50 Years |
| 13 | Transportation | We are very close to the biggest port in the world which is our advantage for sea transportation. |
| 14 | Quality Control | Follow ISO 9001 system and strictly QC inspection for raw material, prototype assembly test, galvanization test and pre-shipment inspection for the both quantity and quality We treat the quality first and 100% inspection ratio. |
Steel tube tower is a traditional superior product of our factory. Especially the self developed multi-station flange processing system has significantly improved the precision of geometric tolerance for each work piece. Thanks to such a process, the 190m high Huangpu large crossing steel tube tower was appraised as a national quality project. Our factory is supplied with advanced equipment such as 2400-ton bending machines, line cutting machines, stitch welding machines, and CNC plasma cutting machines. With these equipment, it is capable to produce equal-diameter tubes and cone-shaped tubes in polygon and round shape. The CNC stitch welding machine can realize one-time moulding of stitch welding for steel tube and the welding line can achieve double-size moulding through single welding. Our factory has been highly affirmed for its production capacity and product quality.
Steel tubular tower members withstand low wind pressure, large cross-section bending rigidity, simple structure, and clear force transmission, which can give full play to the material's bearing performance. On the one hand, it can reduce the weight of the tower and reduce the foundation force; on the other hand, it can help to increase extremes. Ability to resist natural disasters under conditions. When the strength and stability calculation requirements are met, the use of a steel pipe tower with a relatively small wind pressure body shape coefficient can significantly reduce the wind load on the tower body.
Voltage: Power transmission equipment/electric transmission line Angle Iron tower steel tubular tower
Voltage grade:35KV/66KV/110KV/220KV/330KV/500KV/750KV/800KV/1000KV
Production Process
Here is fabrication process for our transmission tower; however, both parties must discuss all drawings and confirm all shop drawings, technical specification, and which standard to conform. Before mass production, we must received all signed approved shop drawings and technical documents from our client.
Our Fabrication shall be in strict accordance with detail Drawings prepared by the Contractor and approved by the Engineer. Fabrication shall begin after the approval of the shop assembly and tests.
| Hot dip galvanizing | Standard | Steel thickness/mm | Mean coating thickness/μm | Metallic Element | Content |
| Pole shafts,cross arms&bolted on accessories | ASTM A123 | >6 | 85 | Mn | 0.25%-0.40% |
| <3-6 | 70 | ||||
| 1.5-3 | 55 | Cu | <0.15% | ||
| <1.5 | 55 | ||||
| Bolts,nuts&washers | GB/T 5267.3-2008 | _____ | ≥ 54 | P | <0.025% |
| (ISO 10684-2004) | |||||
| Foundation bolts | ASTM A153/ A153M-09 | _____ | ≥ 54 | S | <0.03% |
