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Galvanized Welded Steel Pipe

Galvanized welded pipe is hot dip galvanized on the basis of welded steel pipe (that is, the zinc is dissolved in the zinc pot, and then the steel pipe is immersed in liquid zinc for a period of time, and then cooled and dried). The inner and outer walls of the steel pipe are simultaneously attached with a zinc layer. Galvanized pipes are generally used for conveying low pressure fluids (i.e. water, liquid gas).

Category: Welded Steel Pipe

Description

ASTM A123/A123M Requirements

Coating Thickness / Weight dependent upon material category and steel thickness
Finish continuous, smooth, uniform
Appearance free from uncoated areas, blisters, flux deposits and gross dross inclusions as well as having no heavy zinc deposits that interfere with intended use
Adherence the entire coating should have a strong adherence throughout the service life of galvanized steel

The hot-dip galvanized coating is intended for products fabricated into their final shape that will be exposed to corrosive environmental conditions. Once a product has been hot-dip galvanized, any further fabrication, which rarely occurs, may have negative effects on the corrosion protection of the coating. The coating grade is defined as the required thickness of the coating and is given in microns. All coating thickness requirements in specification ASTM A123/A123M, (Tables 1 and 2), are minimums; there are no maximum coating thickness requirements in the specification.

In atmospheric environments, the time to first maintenance of hot-dip galvanized steel is directly proportional to the thickness of the hot-dip galvanized coating. With all other variables held constant, the thicker the zinc coating, the longer the life of the coating. The aim of the finish and appearance requirements is to ensure no coatings have problem areas that are deficient of zinc or have surface defects that would interfere with the intended use of the product. In addition, the coating should have a strong adherence throughout the service of the hot-dip galvanized steel.

Table 1: Minimum Average Coating Thickness Grade by Material Category
All Specimens Tested Steel Thickness Range (Measured) in. [mm]
Material Category	<1/16 [<1.6]	>1/16 to <1/8 [>1.6 to <3.2]	>1/8 to 3/16 [>3.2 to < 4.8]	>3/16 to <1/4 [>4.8 to <6.4]	>1/4 to <5/8 [>6.4 to <16.0]	>5/8 [>16.0]
Structural Shapes	45	65	75	75	100	100
Strip and Bar	45	65	75	75	75	100
Plate	45	65	75	75	75	100
Pipe & Tubing	45	45	75	75	75	75
Wire	35	50	60	65	80	80
Reinforcing Bar	--	--	--	--	100	100

Table 2: Coating Thickness GradeA
Coating Grade	mils	oz/ft2	µm	g/m2
35	1.4	.8	35	245
45	1.8	1.0	45	320
50	2.0	1.2	50	355
55	2.2	1.3	55	390
60	2.4	1.4	60	425
65	2.6	1.5	65	460
75	3.0	1.7	75	530
80	3.1	1.9	80	656
85	3.3	2.0	85	600
100	3.9	2.3	100	705

Additional information

Keywords	Cold Galvanized Pipe , Galvanized Steel Pipe , Hot-dip Galvanized Pipe , Hot-dip Galvanizing Pipe
Size	OD: 21.3mm ~ 660mm;WT: 1mm ~ 17.5mm; LENGTH: 0.5mtr ~ 22mtr (5.8/6/11.8/12 meters, SRL, DRL)
Standard & Grade	ASTM A123/A123M , ASTM A53 GR. A/B/C , BS 1387 , EN 1139 S235JR/S275JR , EN 39 , JIS G3444 STK 400/STK 500
Ends	Square Ends (straight cut, saw cut, and torch cut). or Beveled for welding, Beveled
Delivery	Within 30 days and Depends on your order quantity
Payment	D/P , LC , OA , TT
Usage	Aerospace , Boiler , chemical , Electric Power , Military And Other Industries , Petroleum

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Shipping & Delivery

Uses of packaging in the steel industry

Protective function

- Prevent steel products from physical damage, such as collision, scratching and extrusion, during transport, storage and handling to avoid affecting the quality and appearance of the products.

- Insulate from external environmental factors, such as humid air, rain, dust, etc., to reduce the risk of rust and corrosion of steel and ensure the performance and service life of the products.

Wooden box packaging

- Use: Mainly used to protect some irregular shape, easy to damage or high requirements for packaging of steel products, such as precision parts and components.

- Specific description: the wooden box is made of thick wooden boards, and cushioning materials, such as foam, air cushion, etc., may be added inside to reduce the impact of vibration and collision on the product.

Anti-rust paper packaging

- Purpose: To prevent rust and corrosion of steel products, especially suitable for storage or transportation in a humid environment.

- Specific description: anti-rust paper usually contains rust inhibitors, can be in contact with the metal surface to form a protective film, blocking the erosion of moisture and oxygen.

Plastic film packaging

- Purpose: To provide basic protection against dust and moisture, commonly used for small steel products.

- Specific description: plastic film has a certain degree of flexibility and sealing, can be tightly wrapped in the product surface, effectively isolate the external environment.

Pallet packaging

- Purpose: To facilitate the stacking and handling of steel products, and improve logistics efficiency.

- Specific description: The pallet is usually made of wood or plastic, the steel products are placed on the pallet, and then the forklift and other tools can be used for handling and loading and unloading.

Factory container packing

- Purpose: It is used for mass transportation of iron and steel products, to protect the products and improve the utilization rate of transportation space.

- Specific description: Containers have a strong structure and good sealing, and can adapt to long-distance transportation and the conversion of multiple modes of transportation.

Anti-rust oil coating packaging

- Purpose: To form a layer of antirust oil film on the surface of steel and enhance the antirust ability.

- Specific description: evenly cover the steel surface with anti-rust oil by brushing or soaking to form a durable protective layer.

Metal Corner Protection Packaging

- Purpose: To protect the corners and edges of steel products from damage during handling and transportation.

- Specific description: Metal corner guards are usually installed on the corners of products, using welding, bolting and other methods to increase the strength and impact resistance of the corners.

Baling Steel's packaging will surely convey to you our dedication to quality. We understand the importance of packaging to the quality of steel products and transportation safety, so we strive for excellence in the selection of packaging materials, so that you do not have to worry about the loss of transportation, and fully feel our professionalism and dedication!