Double circuit 400KV OHL

Double circuit 400KV OHL steel tower

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.

400KV double circuit suspension pylon is widely used in oversea market, especially in UK, 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.
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

MEGATRO mainly produce single circuit 400KV OHL steel tower for our European clients, even some other regions or countries. Main some data as follow:

Double circuit, steel lattice "barrel - Bure" shape with two earthwires

Other data such conductor, OPGW and design data will up to client.

Our main design engineer from USA, can use PLS software to design every type steel tower beased 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.

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 110KV overhead transmission line steel tower. After fabrication all 110KV overhead transmission line 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/T8110-1995: 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

                          COMPANY PROFILE

Qingdao Megatro Holding Company Limited is a Structure Steel, Power Transmission line steel tower, Telecom tower, related power materials, wind turbine, wind tower, power flange, fabrication& export& import company. MEGATRO headquarter are located in Qingdao city, Shandong province, CHINA.

MEGATRO fabrication plants are equipped with state of the art equipments and machineries manned by skilled and talented staff. MEGATRO adheres to the principles of “We provide goods every time, and we offer you good all the time! “, “Good Quality Management” and committed to “Heath, Safety and Environment” standard. These values had made our plants certified ISO 9001:2008; ISO 14001:2004 and OHSAS18000:2007 company.

To meet our clients requirements, we also design every type of steel towers & poles as per American Society of Mechanical Engineers(ASME) , American National Standards Institute（ANSI） and clients standard.   Major design engineers come from America, India, and Egypt in meeting the quality requirements for standard of power transmission steel tower, telecom tower and standard fro steel building structures. We have top rank design engineer from Venezuela, USA and India, they can use PLS, TOWER software to design every type of steel structure. Moreover, our Chinese engineer can design every types of tower by software DAO POWER and others.

MEGATRO capabilities combined with the diversified and rich experience of our design engineers distinguish it as a professional manufacturer & trader in the power transmission line steel tower, telecom tower, wind turbine, wind tower, power flange, and structural steel. We are delighted to be a one-stop steel structure solutions with power material and related products provider and aspire to build on these relationships with our clients promising them a future as solid as steel.

Licensed Products:

Design, fabrication, supply and Erection of Steel structures, Telecom Towers, Overhead Electrical Transmission Lind Towers, Power Substation, Power Materials, Wind tower, Wind Turbine, Galvanizing; provide Wind Power Flange, Cables, power fitting &hardware, steel pipe, Insulator , Lam post and related products as per client requirements; Import and Export Steel ore

Object:

We don't make a lot of products you know.
We only make a lot of products you know better.

Mission: COMMITMENT TO EXCELLENT!

Vision:

We are committed to a philosophy of integrity and quality in everything we do.

We support customer focus, continuous improvement and pursuit of excellence in our products, service and people.

We will strive to have a completely satisfied customer at the end of each transaction.