Galvanized Steel Round Tubing manufacturer Tianjin Yuantai Derun(OBM OEM ODM)
- Model
- GI round tubing
Item specifics
- Thickness
- 0.5- 16 mm
- OD(outer diameter)
- 10.3mm-609mm
- Supply capacity
- Annual output of 5 million tons
- Certification
- CE,LEED,BV,PHD&EPD,BC1,EN10210/10219,ISO
- Surface Treatment
- REQUEST
- Tolerance
- as required
- Length
- 0.5-24M according to client requirement
- Standards
- ASTM A500/A501,EN10219,EN10210, JI
- Materials
- Gr.A,Gr.B,Gr.C,S275J0H,S355JR,S355J0H,S355J2H,A36,
- Packaging
- Customers't Requirement
- Delivery Time
- 7-30 Days
Review
Description
Galvanized Steel Round Tubing manufacturer Tianjin Yuantai Derun(OBM OEM ODM)
Galvanized Round Tubing Overview
Galvanized Steel Round Tubings can be divided into two categories: hot-dip galvanized steel round tubings and galvanized strip circular pipes. Galvanized round pipes have better corrosion resistance and oxidation resistance than ordinary black round pipes. Due to the production process of hot-dip galvanized circular pipes, which involves placing black pipes into a zinc bath for galvanizing, the amount of zinc applied and the cost of galvanizing are higher than those of galvanized strip circular pipes.
1、 What is the difference between galvanized strip round pipes and hot-dip galvanized steel round tubings?
1. The color of hot-dip galvanized steel round tubing is a bit white; And the color of the galvanized strip round pipe is a bit blue.
2. Weight of hot-dip galvanized round pipe: 6.5 kilograms per 6 meters (with strong corrosion resistance, long service life, and slightly higher price); And the weight of galvanized strip round pipe: 6 meters long, 5.5 kilograms (with strong corrosion resistance and slightly poor service life compared to hot-dip galvanized steel pipes, with shorter service life and lower price economy).
3. Hot dip galvanized round pipes are snow-white but not shiny or reflective, with many snowflakes on the surface and zinc nodules (condensed zinc) on both ends; And the galvanized strip round tube is shiny white and reflective, with very few snowflakes, and the two ports are clean and free of zinc nodules.
2、 What are the application ranges of galvanized round tubings?
Galvanized steel round tubings are widely used in manufacturing industries such as construction, machinery, coal mining, chemical engineering, electricity, railway vehicles, automotive industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, and mining machinery.
3、Galvanized round tubing sizes
（1）Pre galvanized steel round tubing size
|
Size
|
O.D.(mm) | THK(mm) | Minimum wall thickness |
weld pipe(6m)
|
galvanized pipe
|
||
Nominal inner diameter | inch | Meter weight kg | Piece weight kg | Meter weight kg | |||
DN15 | 1/2 | 21.3 | 2.8 | 2.45 | 1.28 | 7.68 | 1.357 |
DN20 | 3/4 | 26.9 | 2.8 | 2.45 | 1.66 | 9.96 | 1.76 |
DN25 | 1 | 33.7 | 3.2 | 2.8 | 2.41 | 14.46 | 2.554 |
DN32 | 1.25 | 42.4 | 3.5 | 3.06 | 3.36 | 20.16 | 3.56 |
DN40 | 1.5 | 48.3 | 3.5 | 3.06 | 3.87 | 23.22 | 4.10 |
DN50 | 2 | 60.3 | 3.8 | 3.325 | 5.29 | 31.74 | 5.607 |
DN65 | 2.5 | 76.1 | 4.0 | 3.5 | 7.11 | 42.66 | 7.536 |
DN80 | 3 | 88.9 | 4.0 | 8.38 | 50.28 | 8.88 | |
DN100 | 4 | 114.3 | 4.0 | 10.88 | 65.28 | 11.53 | |
DN125 | 5 | 140 | 4.5 | 15.04 | 90.24 | 15.942 | |
|
DN150
|
6 | 168.3 | 4.5 |
18.18
|
109.08
|
19.27
|
|
|
DN200
|
8 | 219.1 | 6.0(welded pipe) |
31.53
|
189.18
|
||
|
DN200
|
8 | 219.1 | 6.5(HDG pipe) |
36.12
|
|||
（2）Hot dip galvanized steel round tubing size
Φ：10.3-3620mm
Wall thickness:0.5-60mm
Length:0.5-24M
For more information,please contact our sales manager:sales@ytdrgg.com
4、How to judge the quality of hot-dip galvanized round tubing?
(1) Appearance of galvanized pipe fittings
The surface of high-quality galvanized pipe fittings should have a complete coating, consistent color, uniform transition, and no sags, drips, or excess lumps on the surface. The surface of the pipe fittings shall not have defects such as missed plating or exposed iron.
(2) Galvanized layer thickness
The thickness of the zinc layer on galvanized pipes is an important indicator for judging the quality of galvanizing, usually measured in units μ M represents the weight of the galvanized layer per square meter (g/m2), and the conversion formula is: 1g/m2=0.14 μ M. Due to the different magnetic and polarizability between zinc and steel, the determination of zinc layer thickness can be non-destructive measured using a zinc layer thickness gauge. To determine the weight of the zinc layer, it is necessary to scrape and sample the zinc layer, and measure it using chemical methods such as antimony chloride method.
The customer manager of Yuantai Derun will also remotely connect with customers on-site to measure the thickness of the zinc layer.
(3) Uniformity of zinc coating
The high-quality galvanized layer has a uniform texture and no leakage or damage after plating. The galvanized pipe fittings can be immersed in a certain concentration of copper sulfate solution for a certain number of times and time. If there is no red leaching substance (metal copper) on the surface, it can be considered that the galvanized pipe fittings have no leakage or damage defects after plating.
(4) Adhesion of zinc coating
The adhesion of the galvanized layer is a standard for measuring the firmness of the bonding between the galvanized layer and the steel pipe. After soaking the steel pipe in a zinc bath for a certain period of time, the surface of the steel pipe will react with the galvanized liquid to form a zinc iron mixed layer. A scientifically sophisticated galvanizing process will form a zinc iron mixed layer with sufficient thickness to improve the adhesion of the zinc layer. The adhesion of the galvanized layer can be monitored by lightly tapping with a rubber hammer, preferably to ensure that the coating does not fall off after a certain number of taps.
5.Galvanized round tubing advantages and Features
long service life
Yuantai Derun steel pipe has long service life
The steel pipe surface is smooth
The surface of the steel pipe shall be smooth without burrs
No joint, no cushion bar
There is no joint and backing bar in the finished steel pipe
Source of raw materials
Large factory direct supply
Each steel pipe 100% complies with international standards
Each steel pipe is inspected layer by layer
OEM&ODM&OBM
Yuantai derun accepts OEM,ODM,OBM
6、One Corner of Yuantai Derun Workshop
7.Strict product inspection
Each steel pipe must pass the inspection layer by layer. Only the products that pass the inspection can leave the factory. Never let an unqualified product flow into the market
8.Certificate
BC1
FACTORY PRODUCTION CONTROL CERTIFICATE,ln compliance with the requirements of BC1:2012 and the Building and Construction Authority, Singapore
EN10210
Manufacture of Hollow Sections :This certificate proves that the performance stability meets the performance of European standards
EN10219
Manufacture of Hollow Sections :This certificate proves that the performance stability meets the performance of European standards
BV
This certficate is issued to attest that Bureau Vveritas Marine & Ofishore has perormed, at the above company's request and in compliance withthe requirements of NR320,a satisfactory assessment of the manudacturing facilities and associated quality procedures related to the ranrge of therecogniition.
EPD
Environmental Product Declaration
PHD
Product Health Declaration
ISO14001（GB/T 24001）
ENVIRONMENTAL MANAGEMENT SYSTEM CERTIFICATE
OHSAS 18001(GB/T28001-2011)
OCCUPATIONAL HEALTH AND SAFETYMANAGEMENT SYSTEM CERTIFICATE
ISO9001(GB/T19001)
The production of rectangular pipe and hot-dip galvanized pipe, the sales and service of metal materials, and the quality management system meet the requirements
GB / t19001-2016 / iso9001:2015
JIS G3466
Jis G 3466 : Carbon steel square and rectangular tubes for general structure meet JIS G3466 standard
