Categories | 24KV lattice tower |
---|---|
Place of Origin: | qingdao of china |
Brand Name: | MEGATRO |
Certification: | ISO9001,ISO14001 |
Model Number: | 230KV single circuit davit cross-arm transmission pole,230 kv steel pole ,230kv transmission pole to |
MOQ: | 1ton |
Price: | FOB QINGDAO USD 1150/TON |
Packaging Details: | export standard package |
Delivery Time: | 30 days or as per client |
Payment Terms: | TT/LC |
Supply Ability: | 40000TONS/YEAR |
230KV single circuit davit cross-arm transmission pole
Our company, QINGDAO MEGATRO HOLDING, CO., LIMITED, is a full service engineering and manufacturing company with a global reputation for delivering excellence and innovation in tower supply. We have over 10 years of experience and innovation in engineering, designing, and building towers.
We design all kinds of towers and posts for:
a. Telecoms
b. Power transmission
c. TV and Radio Broadcast
d. Roads and City Development
e. Wind energy solutions
Our complete selection of towers includes:
a. Self-supporting
b. Monopoles
c. Guyed towers
d. Custom-designed radar towers
e. Broadcast towers
f. Power transmission
MEGATRO also designs and manufactures tower related products including:
a. Fall protection
b. Antenna brackets
c. Other accessories if needed by clients
This photo refers to our 230KV single circuit davit cross-arm transmission pole,
This type pole no need cross-arm, and has string on pole body, insulator install on pole body with string form to davit cross-arm type. Their technical specification as follow:
1 | Line details - Circuit ( SC ) & KV. | SC, 230 KV |
2 | Number of phases. | 3 |
3 | Tower details | Suspension pole |
4 | Nominal Span | 200 |
5 | Wind span | 220m |
Weight span | 300m | |
6 | Conductors Type ( ACSR/AAAC/etc) | ACSR ZEBRA |
Conductor - Single/twin/quad/hexa | SINGLE | |
7 | Earthwire | 7/3.66 mm Galvanised steel Earth wire |
8 | Insulators. | 230 KV LONG ROD POLYMERIC |
9 | Wind Speed | 260 kM/Hr |
10 | Factor of safety. | 1 |
11 | Environmental condition of area (Temp). | Design Ambient Temperature 45 DegC |
12 | Tower Height. | 20-40 Mtr. (Subject to approval ) |
a | Connecting existing line, if any |
|
b | New / Proposed line | New |
13 | Design Code | ASCE Manual No -72 |
Remark: we also can design for our client according to their special requirements.
Our MEGATRO provide and design this type 230KV single circuit davit
cross-arm transmission pole, and mainly serve for our overseas
client. Since 2004, MEGATRO focus mainly international market and
had export many kind of transmission structures to overseas
clients. MEGATRO has been manufacturing lattice transmission tower
& tapered steel poles for lighting, traffic control,
communication and utility applications. MEGATRO pioneered the
development of transmission tower, telecom tower, substation, and
other steel structure and was also at the forefront in the design
of Transmission tower. Our 230KV single circuit davit cross-arm
transmission pole can be manufactured as one large piece, or as
several small pieces which fit together. This type of pole often
used in city power transmission grid, with little space, economic
and lower cost. Now MEGATRO can produce distribution pole with some
type as follow:
(1) Flange connection
(2) Slip joint
(3) Step type
(4) Stagger type
(5) Others
Today, with over 10 years of experience and our commitment to
excellence, MEGATRO remains an industry leader in the manufacture
and design of steel tubular & angular & monopole structures
for all Highway, Municipal, Custom, telecom, lighting and electric
Utility applications. MEGATRO has a complete staff of professional
engineering personnel trained in the PLS Pole program and three
different manufacturing processes for producing steel towers, poles
and other supports. We utilize the latest versions of PLS-CADD,
PLS-POLE, TOWER, AutoCAD and other CAD software.
The structure shall be designed according to load combinations
given as per IEC 61936-1 and as illustrated below:
Normal loads
1 Dead weight load
2 Tension load
3 Erection load
4 wind load
Exceptional loads
1 Switching forces
2 short-circuit forces
3 Loss of conductor tension
4 Earthquake forces
MEGATRO is fully equipped and qualified to carry out Design Engineering services which includes:
√ Overhead Transmission line steel tower & Telecom steel tower
Basic Design and Analysis
√ Shop Erection Drawings
√ As-Built Drawings
MEGATRO performs in-house design activities specializing in electrical overhead transmission &telecom tower steel works, which include wind and earthquake loading, static analysis, stress analysis by finite element methods and fatigue.
Our Engineering Department is boasting of highly qualified engineering who are conversant with international codes and standards. The work is carried out with extensive use of CAE/CAD via a large of computer network. The computer hardware & drafting software are liked to the CNC workshop equipment for downloading of information thereby eliminating error and saving valuable production time.
MEGATRO is one of the few manufactures who assemble a face of 35KV
four circuit terminal towers. This attention to quality may not be the cheapest process but it
does insure every tower meets our high standards of quality. And it
helps to reduce on-site construction cost due to mismatched
assemblies. After fabrication all 230KV single circuit davit
cross-arm transmission poles 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. MEGATRO'
230KV single circuit davit cross-arm transmission poles systems can
accommodate a variety of cross-arm. MEGATRO also offers a wide
variety of accessories and mounts.
Other information:
Availability size: Based on the customer's requirements.
Material: Chinese material or as per clients requirement
Package: Both parties discuss before delivery
Port of Loading: Qingdao Port
Lead Time: One month or based on the customer's needs
Minimum order: 1 ton
Fabrication standard: Chinese Standard or other standard which
client accepted
Steel grades
Tower legs: Chinese steel Q345, which equivalent to ASTM A572 GR50
Other webs, bracing and not stress plate and angle steel: Chinese
Q235B, which equivalent to ASTM A36
Plates: Chinese steel Q345B, which equivalent to ASTM A572 GR50
Bolts: Chinese grade 6.8 and 8.8, which equivalent to ASTM A394
type 0 or ISO 898/6.8
A) Dimension and tolerance for angle are according to
GB/T1591-1994, similar to EN 10056-1/2
B) Hot dip galvanization in accordance with GB/T 13912-2002, which
equivalent to ASTM A 123
C) The welding will be performance in accordance with Chinese
standard, which equivalent to AWS D1.1 or CWB standard
General Fabrication Requirements
Here is general fabrication requirements 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.
Shearing
Shearing and cutting shall be performed carefully and all portions
of the work which will be exposed to view after completion shall be
finished neatly. Manually guided cutting torches shall not be used.
All material over 13 (or 12) mm thick shall be cold sawn or machine
flame cut.
Cropping or shearing shall be allowed for material thickness of 13
mm or less.
Flame cutting of high yield steel shall be preceded by a slight
preheat operation by passing the cutting flame over the part to be
cut.
All flame-cut edges shall be ground clean.
Bending
Bending shall be carried out in such a manner as to avoid
indentation and surface damage. All bending over 5o, or high yield steel, shall be performed while the material is
hot.
Welding
No welding shall be done unless prior approval has been obtained
from the Engineer.
Welding shall not be allowed at tower attachment points for
conductor, shieldwire, insulators or associated assemblies or
brackets.
Sub-punching
All holes in structural steel less than 10 mm thickness may be
punched to full size unless otherwise noted on the approved
Drawings. Holes shown on the Drawings as drilled holes and all
holes in structural steel 10 mm or more in thickness and tension
members of crossarms shall be drilled or sub-punched and reamed.
All holes shall be clean cut and without torn or ragged edges. All
burrs resulting from reaming or drilling shall be removed. All
holes shall be cylindrical and perpendicular to the member.
Where necessary to avoid distortion of the holes, holes close to
the points of bends shall be made after bending.
Punching
For punching to full size, the diameter of the punch shall be 1.0
mm larger than the nominal diameter of the bolt, and the diameter
of the die shall not be more than 1.5mm larger than the diameter of
the punch. For sub-punching, the diameter of the punch shall be 4
mm smaller than the nominal diameter of the bolt, and the diameter
of the die shall be not more than 2 mm larger than the diameter of
the punch. Sub-punching for reamed work shall be such that after
reaming no punch surface shall appear in the periphery of the hole.
Hole Size
Where holes are reamed or drilled, the diameter of the finished
hole shall be not greater than the nominal diameter of the bolt
plus 1.0 mm.
Accuracy
All holes shall be spaced accurately in accordance with the
Drawings and shall be located on the gauge lines.
The maximum allowable variation in hole spacing from that indicated
on the Drawings for all bolt holes shall be 0.8 mm.
Fabrication Tolerances
A specification for tolerances shall be submitted for approval by
the Engineer prior to commencement of fabrication.
Bolt List
A complete list of bolts showing their lengths and the members,
which they are to connect shall be given on the erection diagrams.
Locking Devices
Locking devices for tower bolts will not be required, but point
punching shall be performed.
Anti-theft Fasteners
Appropriate anti-theft fasteners for example Huck-bolting shall be
applied on all the towers up to the level of anti-climbing devices,
to prevent theft of tower members.
Piece Marks
All pieces shall be stamped before galvanizing with the piece marks
shown on the erection Drawings, with the marking not less than 20
mm high placed in the same relative location on all pieces. The
marking shall be plainly visible after galvanizing.
Galvanizing
All material shall be hot-dip galvanized after fabrication in
accordance with the latest revision of GB/T 13912-2002 or ASTM
Specification A 123.
Material that has been rejected because of bare spots or other
coating defects shall either be stripped and re-galvanized, or the
uncoated areas shall be recoated by an approved method.
All plates and shapes which have been warped by the galvanizing
process shall be straightened by being re-rolled or pressed. The
material shall not be hammered or otherwise straightened in a
manner that will injure the protective coating.
Approval shall be secured from the Engineer if galvanizing is done
outside of the Contractor's plant.
All galvanized steelwork shall be protected against white storage
stain by using an approved dichromate solution treatment
immediately following galvanizing.
APPLICABLE STANDARD AND CODES
All towers manufactured and design shall be generally in accordance
with latest revision of the following standards except where
specifically directed otherwise.
General
IEC 60826 - Design criteria of overhead lines
IEC 60652 - Loading tests on overhead line structures
ISO 1459 - Metallic coatings - Protection against corrosion by Hot
Dip Galvanizing
ISO 1461 - Hot dip galvanized coatings on fabricated iron and steel
articles
ISO 12944 - Paint coatings, corrosion protection, and structural
steelwork
ISO 898-1 - Mechanical properties of fasteners. Part 1-Bolts,
Screws and studs
ISO 630 - Structural Steels - plates, wide flats, bars, sections
and profiles
ISO 657 - Hot rolled structural steel plates tolerances on
dimensions and shape
ISO 7411 - Hexagon Bolts for high strength structural bolting with
large width across flats
ISO 657-5 - Hot rolled Structural Steel Sections equal and unequal
leg angles
ISO 7452 - Hot rolled structural steel plates tolerances on
dimensions and shape
BS EN 50341-1 - Overhead electrical lines exceeding AC 45kV
-General Requirements
BS 8004 - Code of Practice for Foundations
BS 8110 - Structural use of concrete
ANSI10-97 - Design of latticed steel transmission structures
IEC 60050 (151) International Electro-technical Vocabulary
Part 51 Electrical and Magnetic Devices
IEC 60050 (601) Chapter 601: Generation, transmission and
distribution of electricity-General
IEC 60050 (601) Chapter 601: Generation, transmission and
distribution of electricity-Operation
IEC 60059 IEC standard current ratings
Chinese Standard
No | Code | DESCRIPTION |
1 | GB/T2694-2003 | Power Transmission line Steel 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 and Test Method for Hot-dip galvanized Metal Parts |
American Standards:
Standard | Description |
ASTM A6/A6M | Standard specification for general requirements for rolled structural steel bars, plates, and sheet piling. |
ASTM - 6 | - General Requirements for delivery of Rolled Steel Plates, Shapes, sheet Piling Bars for structural used |
ASTM A36/A36-M-97a | Standard specification for Carbon structural steel |
ASTM A123 / A123M-02 | Standard specification for Zinc (Hot-Dip Galvanized) Coatings on iron and steel products |
ASTM A143 / A143M-03 | Standard Practise for Safeguarding Against Embitterment of Hot-Dip Galvanized Structural Steel Products and Procedure for Detecting Embitterment |
ASTM A153/ A153M-05 | Standard specification for zinc coating (Hot-Dip) on iron and steel hardware |
ASTM A - 194 | - Grade for bolt |
ASTM A239 | Standard practice for locating the thinnest spot in a zinc (Galvanized) Coating on Iron or Steel Articles |
ASTM A242 | Standard specification for High-Strength Low-Alloy Structural steel |
ASTM A307 | Standard Specification for Carbon Steel Bolts and Studs, 60000 PSI Tensile strength |
ASTM A370-06 | Standard Test Methods and Definitions for Mechanical Testing of Steel Products |
ASTM A325 | Standard Specification for structural bolts, steel, Heat treated 120/105 ksi minimum tensile strength |
ASTM A-325 or A-354 | - Galvanized hexagonal head of connection bolt |
ASTM A325-97 | Standard Specification for High-strength Bolts for structural steel Joints |
ASTM A384 / A384M-02 | Standard Practise for Safeguarding Against Warpage and Distortion During Hot-Dip Galvanizing of Steel Assemblies. |
ASTM A394-93 | Standard Specification for steel Transmission Tower, Bolts, Zinc Coated and Bare |
ASTMA - 563 | - Class and size of nuts |
ASTMA - 572 | - Chemical composition of steel |
ASTM A572/A572-97c | Standard specification for High-Strength Low-Alloy Columbium-Vanadium Structural steel |
ASTMA - 615 | - The anchor bolt material |
ASTM A673 / A673M-07 | Standard Specification for Sampling Procedure for Impact Testing of Structural Steel |
ASTM B201 | Standard practice for testing Chromatic coating on Zinc and Cadmium surfaces |
ASTM E94-93 | Standard Guide for Radiographic Testing |
ASTM E 709-95 | Standard Guide for Magnetic Particle Examination |
ASCE Manual 72 | - Load testing a simple structure |
ASCE 10-97 | Standard Design of latticed steel transmission structures |
AWS D1.1 | American Welding Society D1,1/D1,1M structural Welding code- Steel |
ANSI B-182-2 | Bolts, nuts and washers dimensions |
DIN VDE 0101 - Isokeraunic Level
VDE 0201 - Climatic and environmental conditions
CVDE 0210 - Minimum safety factors under simultaneous working loads
ISO R898 Mechanical Properties of Fasteners
BS EN ISO 1461:1991 - High dip galvanized coatings on fabricated
iron and steel articles. Specifications and standards
A) BS 5950: Welding Terms And Symbols
B) BS 729: Hot - Dip Galvanised Coating On Iron And Steel Articles
C) BS 2901: Filler Rods And Wires For Gas Shielded Arc Welding:
Part 1 Ferritic Steels
D) BS 3692: ISO Metric Precision Hexagon Bolts, Screws And Nuts
E) BS 4360: Weldable Structural Steel
F ) BS 5135: Metal - Arc Welding Of Carbon And Carbon Manganese
Steel
G) BS 5950: Part 1: Code Of Practice For Loading Latticed Tower
& Masts
Part 2: Guide To The Background And Use Of Part 1"Code OF Practice
For Loading"
Part 3: Strength Assessment of Members
H) DD 133 (1986): Code Of Practice For Loading Latticed Tower &
Masts
I) BS 4592 (1987): Part 2: Specification For Expanded Metal Grating
Panels
J) BS 4592 (1977): Code Of Practice For Protective Coating Of Iron
And Steel Structure Against Corrosion
K) BS 4190: Bracing & Flanged Bolts
L) BS 4190: Rolled Steel sections, Flats & Plates
If any special requirement, we can design and discuss with client.