Hebei, China
Business Type:
Manufacturer/Factory, Trading Company, Group Corporation
Registered Capital:
3000000 RMB
Plant Area:
>2000 square meters
Management System Certification:
ISO 9001
Average Lead Time:
Peak season lead time: one month
Off season lead time: within 15 workdays
OEM/ODM Service
Sample Available

Galvanized Light Pole, Expressway Galvanized Pipe, Galvanized Construction Pipe manufacturer / supplier in China, offering Astma123 Hot Dipped Galvanized Gi Steel Pipe Seamless Used in Pipeline and Construction, Seamless Steel Pipe ASTM A106b API 5L Grb Ss400 S235jr ASTM B 36.1m DIN 2448 Carbon and Alloy Steel, Street Light Pole Galvanized Seamless Pipe Hot DIP Dalvanzing Tube and so on.

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Astma123 Hot Dipped Galvanized Gi Steel Pipe Seamless Used in Pipeline and Construction

Min. Order / Reference FOB Price
5 Tons US $750-990/ Ton
Port: Tianjin, China
Production Capacity: 200tons/Day
Payment Terms: L/C, T/T
Type: Seamless
Technique: Hot Rolled
Material: Carbon Steel
Surface Treatment: Galvanized
Usage: Pipeline Transport, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
Section Shape: Round

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Basic Info.

Model NO.
hot Galvanized
Hot Galvanized Pipe
Transport Package
Cangzhou, China
HS Code

Hot Galvanized GI Steel Pipe

Hot dip galvanized steel pipe is widely used in construction, machinery, coal mine, chemical industry, electric power, railway vehicles, automobile industry, highway, bridge, container, sports facilities, agricultural machinery, petroleum machinery, mining machinery and other manufacturing industries.

Galvanized steel pipe surface with hot dip or electric galvanized layer of welded steel pipe. Galvanizing can increase the corrosion resistance of steel pipe and prolong its service life. Galvanized pipe USES is very wide, in addition to a general low pressure fluid such as water, gas, oil line pipe, also used as oil industry, especially the ocean oil field oil well pipe, oil pipe, chemical coking equipment of oil heater, the condensing, exchange of coal distillation wash oil cooler for tube, and trestle pile, mining tunnel supporting frame tube, etc.


SpecificationOD 26.9mm-310mm
WT 1.2-20mm
Length 1-12m
Zinc coat200-600g/m²20-83μm0.13-2oz/ft²
TechniquePre-galvanized  / Hot-dipped galvanized  / Hang-planting galvanization
Steel grades

Q195, Q235A-B, Q345A-E, 20#, 10#,16Mn, ASTM A36,ASTM A500, 

ASTM A53, ASTM 106, SS400, St37, St52, S235JR, S355TRH ect.

StandardsGB/T 3091-2001,GB/T13912-2002, BS 1387, ASTM F1083 ect.
Pipe ends

plain, beveled, threaded, socket with holes, with PVC clap/ coupling/ clamp, 

or as customers' requirement


liquid delivery (pump well, gas, water), construction pipe, structural 

pipe(greenhouse structure, fence post), curtain wall, machinery part ect.


in bundle, no other package or wrapped with waterproof, 

or as customers' requirement

Delivery Time10days from stock; 15-20days produced according to the qty
Payment TermT/T or L/C
Price TermCIF; CFR;  FOB
Loading PortXingang China

1.All the pipes is high-frequency welded.

2.Both inner and outer welded stab can be removed.

3.Special design available according to requirement.

4.Pipe can be necked down and punched holes.

5.Supplying BV or SGS Inspection if client need.

2.Hot-dip galvanized pipe features
Hot-dip galvanizing is divided into blown plating (hanging plating) and immersion plating (hanging plating) depending on the process.

Characteristics of blown plating (hanging plating): The advantage is that the galvanized layer is relatively uniform, the surface is bright, and the defect is that the zinc content is low, about 200g/m2;

Characteristics of hanging plating: The advantage is that the zinc content is high, about 500g/m2, which can meet the customer's requirements for the high zinc layer thickness value; the defect is that the surface of the galvanized layer is uneven, and it is easy to produce zinc tumor and zinc slag, which affects the appearance

3.What causes the surface of the galvanized steel pipe to pitting?

(1), the aluminum content on the surface of the zinc liquid is higher at the beginning of the work, when more than 0.3%, the viscosity of the zinc liquid increases, so that the zinc slag does not easily precipitate and fall, and adheres to the surface of the galvanized steel pipe;
(2) In addition to the increase of aluminum content on the surface of zinc liquid at the beginning of construction or shutdown, the temperature of zinc liquid is often higher than that during normal production. The convection phenomenon is aggravated when the temperature of zinc liquid is high, and a part of zinc slag is brought up. Adhered to the galvanized steel pipe;
(3) Due to the presence of aluminum, the iron in the zinc solution will quickly combine with aluminum to form FE---AL particles, which are suspended in the zinc liquid due to the small density of the particles, and adhered to the steel pipe.

4.ZnMA coating standard for ASTMA123 steel products
material typewall thickness scope
structure and plate(μm)45657585100
Strip and bar45657585100
steel pipe and pipeline4545757575
wire rod3550606580
strong steel bar100

5. Process and surface

Astma123 Hot Dipped Galvanized Gi Steel Pipe Seamless Used in Pipeline and Construction

Astma123 Hot Dipped Galvanized Gi Steel Pipe Seamless Used in Pipeline and Construction

Astma123 Hot Dipped Galvanized Gi Steel Pipe Seamless Used in Pipeline and Construction


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