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Galvanized Steel Pipe

Pipe Type: FBE (Fusion Bond Epoxy) Coated Pipe, Epoxy Coated Carbon Steel Pipe
Application:Used for transporting low pressure liquid, gas and heating
Specification:OD:OD: 21.3mm ~ 406.4mm
WT:WT: 0.5mm ~ 20mm
LENGTH: 0.3mtr ~ 18mtr, Ramdon Length, Fixed Length, SRL, DRL
Standard: GB/T 3091 Q195/Q215/Q235/Q345, ASTM A53, BS 1387, JIS G3444 STK400/STK500, EN 39, EN 1139 S235JR/S275JR, EN 10025, EN 10219
A795,s355,DIN30670,bs1387,q235b,s355j2h,q345b Grade:X42,X52,X56,X60,X65,X70,PSL1,PSL2,API5L.GRA,B,C
Ends: Square Cut/Threaded, Burr Removed,Zinc Coating: 120~500 g/m2 (30um~70um)
Surface:Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement
Packing:Steel Strips bundled, Plastic Caps plugged, Waterproof Paper wrapped etc.

Specification  

Galvanized steel pipe(galvanized pipe), Galvanised steel pipe(galvanised pipe)

Galvanized steel pipes are made of steel that has been covered with a layer of zinc metal. During the galvanizing process, we immerse the steel in a molten zinc bath, ensuring a tough, uniform barrier coating. \

Length of the galvanized tubes
- in diameter 4 - 16 mm 6000 + 100 mm
- in diameter 18 - 42 mm 6000 + 50 mm

Tolerances of the zinc coated tubes
- tolerances of the outside diameter:
- diameter between 4 - 30 mm ±0,08 mm
- diameter between 35 - 38 mm ±0,15 mm
- diameter up to 42 mm ±0,20 mm
- tolerances of the inside diameter are according to EN 10305-4 
- tolerance of the wall thickness ± 10%

The Steel grades for the zinc coated tubes
E 235+N and E 355+N

gi pipe

A53 Pipe Materials & Manufacture

Steel materials used to create seamless pipe and welded pipe must be produced via open hearth, electric furnace, basic oxygen, or any combination of these processes. All weld seams in electric-resistance welded A53 Grade B pipe must be heat treated after welding to a minimum of 1,000°F (540°C) to eliminate untempered martensite.

 Galvanized A53 Pipe

If ordered galvanized, A53 seamless pipe must be coated inside and out via the hot-dip process. Zinc used for galvanized coatings must conform to Specification B6. The weight of this coating must not be less than 1.8 oz./ft2 (0.55 kg/m2). Test specimens for coating weight testing will be cut in approximately 4” lengths.
Permissible Variation in Wall Thickness
The minimum wall thickness at any point in a length of A53 steel pipe must not be more than 12.5% less than the specified wall thickness.
Permissible Variations in Outside Diameter
For ASTM A53 steel pipe NPS 1-1/2 and smaller, outside diameter must not exceed 1/64” over and 1/32” under specified diameter. For A53 pipe NPS2 and larger, outside diameter must not exceed 1% over and 1% under specified diameter.
Hydrostatic Testing of ASTM A53 Pipe 
Separate hydrostatic inspection test pressures are specified for plain end, threaded, and coupled A53 steel pipe. Minimum hydrostatic test pressure for NPS 3 and under is 2,500 psi; minimum test pressure for sizes over NPS  3 is 2,800 psi. Pressure must be maintained for a minimum of 5 seconds, for all sizes.
Mechanical Testing of ASTM A53 Pipe
Electric-resistance welded ASTM A53 steel pipe of NPS 8 and larger must be transverse tested. Sending test (cold) is required for STD and XS-NPS 2 and under, and for XXS-NPS 1-1/4 and under. Flatten testing is required for NPS 2 and larger STD and XS A 53 pipe; flatten testing is not required for XXS pipe.


Size

OD

 1/8” -24” (5.15mm-714mm)

Wall Thickness

0.4mm-26mm

SCH20,SCH40,STD,XS,SCH80,SCH160,XXS

Length

Less than 12m

Steel material

Q195 → SS330,ST37,ST42

Q235 → SS400,S235JR

Q345 → S355JR,SS500,ST52

Standard

ASTM A53, BS1387-1985

Zinc Weight

120g,270g,400g,500g,550g

20μm ,40μm ,60μm,70μm,80μm

Usage

1)low pressure liquid, water, gas, oil, line pipe

2)construction

3)fence, door pipe

Ends

1) Plain

2) Beveled

3) Thread with Coupling or cap

4) Chamfer

5) Groove

6) Screw

End protector

1) Plastic pipe cap

2) Iron protector

Surface Treatment

1) Bared

2) Black Painted (varnish coating)

3) Galvanized

4) Oiled

5) PE,3PE, FBE, corrosion resistant coating, Anti corrosion coating.

Technique

Electronic Resistance Welded (ERW )

Electronic Fusion Welded (EFW)

Double Submerged Arc Welded (DSAW)



Welded Line Type

Longitudinal

Section Shape

Round

Inspection

With Hydraulic Testing, Eddy Current , Infrared Test

Package

1) Bundle,

2) Bags

Delivery

1) Container

2) Bulk carrier

Port of Shipment

Xin gang Port, Tianjin, China

Date of Delivery

According To The Quantity And Specification Of Each Order

Payment

L/C T/T

Others

Fitting as screws and flange also can be supplied.



Chemical Requirements 


Carbon

Manganese

Phosphorus

Sulfur

Copper

Nickel

Chromium

Molybdenum

Vanadium

Composition, max. %

Type S (seamless pipe) & Type E (electric-resistance-welded)

Grade A

0.25

0.95

0.05

0.045

0.4

0.4

0.4

0.15

0.08

Grade B

0.3

1.2

0.05

0.045

0.4

0.4

0.4

0.15

0.08


Type F (furnace-welded pipe)

Grade A

0.3

1.2

0.05

0.045

0.4

0.4

0.4

0.15

0.08



Hot Dip Galvanizing Process

Material Inspection (Steel Pipe) --- Hanging --- De-greasing --- Rinsing --- Pickling --- Washing --- Dipping Fluxing --- Hot Air Drying --- Inside and Outside Hot-dipped Galvanizing Blow

--- Cooling --- Passivation and Rising --- Unloading --- Inspection and Trimming --- Type Identification --- Packaging and Storing and Transportation


Surface condition of the galvanized tubes
First layer – electrolitically leached zinc (Zn) – acts as anode and in a corrosive environment it corrodes first and the base metal is cathodically protected against corrosion. The zinc layer thickness may be in the range of 5 to 30 micrometers (µm).

 

galvanized steel pipe

Product Advantages

- Extraordinary Anti-corrosion Characteristic
- Strong Adhesive Zinc Coating on the steel pipe
- Evenly Covered Zinc Coating on the internal and external pipe surface
- Measureable Zinc Coating Thickness
- Long Application Life for the steel pipe

Commitment to Our Clients

 - We Make it Right. Right Products=Customized Products, Right Price=Competitive Market Price, Right Packing=Safe Packing

- On Time Delivery. 48 Hours Domestic Delivery by Truck. 10~45 Days International Shipping by Cargo.
- Extraordinary Customer Services. One-stop Procurement for Steel Pipes and Fittings, Flexible Payment Terms, Professional After-sales Services Team

Application:

1.Building and structural material
2.Mechanical and general engineering purposes
3.Manufacturing of Bus Body, Railway Boogies
4.In Telephone department as Conduit Pipes

Types: Galvanzied welded steel pipe, galvanzied seamless steel pipe
Materials: Carbon steel
Connection type: threaded
Size range:1/8"-36"
Schedule: sch40, sch80, sch120, sch160, XH, XXH


 


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  Hunan Gaoxing Steel Development Zone, No.1888 Purui South Rd, Wangcheng District,Changsha, Hunan, China

  0086-187-7406-7534

  inquiry@threewaysteel.com

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