Qingdao Megatro industry company |
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400kV double circuit suspension pylons
400KV double circuit suspension pylon is widely used in oversea
market, especially in Indian, Africa and other European countries
market. Since 2008, we had design and supply every type of 400KV
double-circuit suspension pylons for our oversea clients.
A double-circuit suspension pylon has two circuits. For three-phase
systems, each tower supports and insulates six conductors. In HVDC
systems typically two conductors are carried per line, but rarely
only one pole of the system is carried on a set of towers. Both
tubular and lattice steel towers can be designed so as to support
two circuits of electrical current. Double-circuit towers hold the
different conductors stacked atop one another, while in
single-circuit towers the conductors are lined up horizontally.
MEGATRO can optimized design and make pylon less weight, high
strength, proper span distance, good wind resistance, and economy
in the use of materials. MEGATRO is equipped with sophisticated
machinery and equipment for the manufacture of 400KV double-circuit
suspension pylons, and offers a variety of designs to meet client
specific. Lattices of triangular cross-section are most common, and
square lattices are also widely used. After fabrication all 400KV
double-circuit suspension pylons, 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.
Other information
Place of Origin: Qingdao, Shandong, China.
Availability size: Based on the customer's requirements
Material: Chinese material or as per clients requirement
Fabrication: Based on the customer's drawings and technical
requirements
Package: Both parties discuss and agreed before delivery
Terms of Payment: L/C, T/T
Minimum Order Quantity: 1 ton
Port of Loading: Qingdao Port
Delivery Time: One month or based on the customer's needs
Performance Standard
Besides conform to the drawing and design, the materials and
fabrication of tower components shall conform to the Chinese
Standard or other standard which clients can accept.
Besides conform to the drawing and design, the materials and
fabrication of tower components shall conform to the following
standards (Chinese Standard 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/T8220-1995: 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