A333 A335 Stpt42 G3456 St45 DN15 Sch40 LSAW Hfw ERW SSAW Carbon Hot Rolled/Cold Rolled/Cold Drawn Galvanized/ Precision/Welded/Seamless Steel Pipe

Model NO.
A333
Usage
Pipeline Transport, Boiler Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products
Section Shape
Round
Transport Package
Customized
Specification
Customized
Trademark
GZ steel
Origin
China
HS Code
7306309000
Production Capacity
10000 Tons Per Month
Reference Price
$ 549.00 - 567.00
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Product Description

Product Description

Welded steel tubes with hot dip or electrogalvanizing coating. 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.
Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for water transmission, gas, oil and other general low-pressure fluids, they are also used as oil well pipes and oil transmission pipes in the petroleum industry, especially in offshore oil fields, as well as pipes for oil heaters, condensing coolers, coal distillation oil washing exchangers of chemical coking equipment, as well as trestle pipe piles, support frames of mine tunnels, etc.

Hot-dip galvanizing (HDG), as referenced is the process of dipping fabricated steel into a kettle or vat of molten zinc.
Hot-dip galvanizing (HDG) is the process of coating iron, steel or ferrous materials with a layer of zinc. This done by passing the metal through molten zinc at a temperature of 860°F (460°C) to form zinc carbonate (ZNC03). Zinc carbonate is a strong material that protects steel and can prevent corrosion in many circumstances. Hot-dip galvanizing can be carried out cheaply and in large batches.

Benefits of galvanized pipe
Because the pipes are galvanized, it is protected from rust and corrosion. Steel rusts after interacting with water or moisture in the air over time. By adding a coating of zinc to the tubing, galvanized steel round tubing corrodes much slower, extending the life of your tubing.
In addition to this, galvanized pipe also provides:
  • Lower cost than stainless steel
  • Lowest long-term cost
  • Reliable performance
  • Excellent resistance to mechanical damage
Hot-dip galvanizing involves three main steps:

Preparation : The galvanizing reaction will only occur on a chemically clean surface, so the first step of the process involves removing contamination. First, the metal is degreased using a caustic solution and then dipped in hydrochloric acid to remove rust, mill scale, welding slag, paint and grease. This followed by a rinse and a dip in a flux solution, which is usually about 30 percent zinc ammonium chloride.

Galvanizing : When the clean iron or steel component is dipped into the molten zinc (at 842°F (450°C)), zinc-iron alloy layers form as a result of a metallurgical reaction between the iron and zinc. When the material is pulled from the galvanizing bath, a layer of molten zinc is present on top of the alloy layer. When it cools, it has the bright, shiny appearance associated with  Galvanized Products .

Inspection : After galvanizing, the coated materials are inspected for coating thickness and coating appearance. A variety of simple physical and laboratory tests may be performed to determine thickness, uniformity, adherence and appearance of the zinc coating.

Quite simply, galvanizing a metal gives it anti-corrosion properties. Without the protective zinc coating, the metal would remain exposed to the elements and potentially oxidize and corrode much faster. Galvanized Steel is a cost effective alternative to using materials such as austenitic stainless steel or aluminum in order to prevent corrosion.

Detailed Photos

A333 A335 Stpt42 G3456 St45 DN15 Sch40 LSAW Hfw ERW SSAW Carbon Hot Rolled/Cold Rolled/Cold Drawn Galvanized/ Precision/Welded/Seamless Steel Pipe

Product Parameters
Product Name
Galvanized Steel Pipe
Out Diameter
Pre galvanized:1/2''-4''(21.3-114.3mm).
Such as 38.1mm, 42.3mm, 48.3mm, 48.6mm or as customer request.
Hot dipped galvanized:1/2''-24''(21.3mm-600mm).
Such as 21.3mm, 33.4mm, 42.3mm, 48.3mm, 114.3mm or as customer request.
Thickness
Pre galvanized:0.6-2.5mm.
Hot dipped galvanized: 0.8- 25mm.
Zinc coating
Pre galvanized:5μm-25μm
Hot dipped galvanized:35μm-240μm
Type
Electronic Resistance Welded (ERW)
Steel Grade
Q235, Q345, S235JR, S275JR, STK400, STK500, S355JR, GR.B-D.....
Standard
BS1139-1775, EN1039, EN10219, JIS G3444:2004, GB/T3091-2001, BS1387-1985, DIN EN10025, ASTM A53 SCH40/80/STD, BS-EN10255-2004
Surface Finish
Pre-galvanized, Hot dipped galvanized, Electro galvanized, Black, Painted, Threaded, Engraved, Socket.
International Standard
ISO 9000-2001, CE CERTIFICATE, BV CERTIFICATE
DN OD ASTM A53 / API 5L / ASTM A795 BS1387 / EN10255
SCH10S STD SCH40 SCH80 Light Medium Heavy
MM INCH MM MM MM MM MM MM
15 21.3 1/2" 2.11 2.77 3.73 2 2.6 -
20 26.7 3/4" 2.11 2.87 3.91 2.3 2.6 3.2
25 33.4 1" 2.77 3.38 4.55 2.6 3.2 4
32 42.2 1-1/4" 2.77 3.56 4.85 2.6 3.2 4
40 48.3 1-1/2" 2.77 3.68 5.08 2.9 3.2 4
50 60.3 2" 2.77 3.91 5.54 2.9 3.6 4.5
65 73 or 76 2-1/2" 3.05 5.16 7.01 3.2 3.6 4.5
80 88.9 3" 3.05 5.49 7.62 3.2 4 5
90 101.6 3-1/2" 3.05 5.74 8.08      
100 114.3 4" 3.05 6.02 8.56 3.6 4.5 5.4
125 141.3 5" 3.4 6.55 9.53   5 5.4
150 168.3 6" 3.4 7.11 10.97   5 5.4
200 219.1 8" 3.76 8.18 12.7      
250 273.1 10" 4.19 9.27 15.09      
Different methods of galvanizing
There are several different processes for galvanizing metal:

HOT-DIP GALVANIZING
As the name implies, this method involves dipping the base metal into a molten pool of zinc. First, the base metal must be cleaned either mechanically, chemically, or both to assure a quality bond can be made between the base metal and the zinc coating. Once cleaned, the base metal is then fluxed to rid it of any residual oxides that might remain after the cleaning process. The base metal is then dipped into a liquid bath of heated zinc and a metallurgical bond is formed.
The advantages of this method are that it is economical; it can be performed quickly and to complex shapes. However, the final coating can be inconsistent relative to other galvanizing processes.

PRE-GALVANIZING
This method is very similar to hot-dip galvanizing but is performed at the steel mill, usually on materials that already have a specific shape. Pre-galvanizing involves rolling metal sheet through a similar cleaning process to that of the hot-dip galvanizing process. The metal is then passed through a pool of hot, liquid zinc and then recoiled.
An advantage of this method is that large coils of steel sheet can be rapidly galvanized with a more uniform coating compared to hot-dip galvanizing. A disadvantage is that once fabrication of the pre-galvanized metal begins, exposed, uncoated areas will become present. This means that when a long coil of sheet is cut into smaller sizes, the edges where the metal is cut are left exposed.

ELECTRO-GALVANIZING
Unlike the previous processes, electrogalvanizing does not use a molten bath of zinc. Instead, this process utilizes an electrical current in an electrolyte solution to transfer zinc ions onto the base metal. This involves electrically reducing positively charged zinc ions to zinc metal which are then deposited on the positively charged material. Grain refiners can also be added which helps to ensure a smooth zinc coating on the steel. Similar to the pre-galvanizing process, electrogalvanizing is typically applied continuously to a roll of sheet metal.
Some advantages of this process are a uniform coating and precise coating thickness. However, the coating is typically thinner than the coating of zinc achieved by the hot-dip galvanizing method which can result in reduced corrosion protection.
Company Profile

About Us
We provide one-stop trading services, including: design, quotation, inspection,packaging, delivery and installation to meet customer needs. We have many excellent experienced personnel. Our technical team combines advanced technology to provide sketch design and efficient project solutions. Our international sales staff can use professional knowledge to solve your problems. Our customers will always be respected because we meet all aspects of your personal needs.The company has always insisted on striving for survival by quality,continuously innovating in management and technology,and has established a sound scientific management and quality assurance system.
A333 A335 Stpt42 G3456 St45 DN15 Sch40 LSAW Hfw ERW SSAW Carbon Hot Rolled/Cold Rolled/Cold Drawn Galvanized/ Precision/Welded/Seamless Steel Pipe A333 A335 Stpt42 G3456 St45 DN15 Sch40 LSAW Hfw ERW SSAW Carbon Hot Rolled/Cold Rolled/Cold Drawn Galvanized/ Precision/Welded/Seamless Steel Pipe

Packaging & Shipping

We offer different modes of transport depending on the customer's destination: rail transport and ship transport,etc.The Shipping Mark shall consist of: Trade mark, Seller's name, Product name, Applicable standards,Specifications, Package No., Contract No., Heat No., Production date, Weighing method, Net weight, Gross Weight, Consignee and Protection symbols, etc.

 

Steel Pipe & Tube

PNEUTEC.IT, 2023