345KV SINGLE CIRCUIT STEEL TOWER
Compared the freestanding framework self-supporting tower, the guyed lattice masts are normally guyed in three directions equally spaced 120 degrees apart over an anchor radius of typically 2/3 of the tower height, The mast construction consists of triangular lattice modular section, each module fully welded tubular leg and solid round bar bracing incorporating integral step rungs fabricated into the lattice framework on one face this removes the need for a separate ladder. All masts sections are hot dipped galvanized after fabrication. Mast heights range 9 up to 50 meters, these masts can also be Etched primed and powder coated as an optional extra if required. Megatro provide every type of 345KV single circuit guyed tower for our client, which carries conductors for only one circuit and tower supported by guyed wire.
We have main advantages in tower designs, and our main design engineer from USA, can use PLS software to design every type steel tower based on structural calculations and geometrical frame drawings. To meet the expectation, we produce shop drawings, components list and full production documentation, and even complete 3D models that facilitate the elimination of all design and drawings errors generated on the drawings. Another advantage is our 3D design and loading & design report, and can optimized the design and save cost for our clients. Then we can calculate the guyed tower loading and choose reliable guyed wire and tower shape for our client.
Moreover, MEGATRO had professional QA &QC team to control quality and execute strict QC & QC plan as per client requirements. MEGATRO is one of the few manufactures who assemble a face of 345KV single circuit guyed steel tower. After fabrication all 345KV single circuit guyed steel tower are delivered to the galvanizing facility to be Hot DIP Galvanized. Towers are processed through the facility by Caustic Cleaning, Pickling, and then Fluxing. These strict procedures insure years of maintenance free towers. Even we take secondary finish for client again, which as duplex surface treatment. The duplex coating applied in our own paint shop.
Fabrication standard: Chinese or other standard:
1. GB/T2694-2003 Transmission line tower - - Technical requirements for manufacturing
2. JGJ81-2002: Technical specification for welding for steel structure of building
3. GB9787-88: Measuring and allowable tolerance for hot-rolled equal angle
4. GB709-88: Measuring and allowable tolerance for hot-rolled plate and strip
5. GB/T699-1999: Quality Carbon Structural Steel
6. GB/T1591-1994: Low alloy high strength structural Steel
7. GB700-88: Carbon Structural Steel
8. GB222-84: Method of sampling steel for determination of chemical composition and permissible variations
9. GB/T228-2002: Method for Tensile testing of metals
10 GB/T232-1999: Method for Bending test of metals
11 GB/T5117-1995: Carbon Welding Rod
12 GB/T5118-1995: Low Alloy Welding Rod
13 GB/T8345-1995: Welding wires for gas shielding arc welding of carbon and low alloy steels
14 GB/T10045-2001: Carbon steel flux cored electrodes for arc welding
15 JB/T7949-1999: Weld outer dimensions for steel construction
16 GB50205-2001: Test Standard for Acceptance of Steel Structure
17 GB/T470-1997: Zinc Ingot
18 GB3098.1-2000: Mechanical properties of fasteners-Part 1: Bolts, screws and studs
19 GB3098.2-2000: Mechanical properties of fasteners-Part2: Nuts, and thread
20 GB3098.3-2000: Mechanical properties of fasteners-Part3: Fastening screw
21 GB/T5780-2000: Helical Bolts Grade C
22 GB/T41-2000: Helical Nuts Grade C
23 GB/T90-2002: Flat Washer Grade C
24 GB/T13912-2002: Metal Coating, Technical Requirement
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