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รูปภาพสินค้า	ชื่อสินค้า	ขนาดสินค้า	ความหนา	ความยาว	น้ำหนักต่อเส้น (kg)	สี
-	ท่อกลม GI (½")	OD 21.70	2.00	6000	5.82	-
-	ท่อกลม GI (¾")	OD 27.20		6000	7.44	-
-	ท่อกลม GI (1")	OD 34.00		6000	9.48	-
-	ท่อกลม GI (1-¼")	OD 42.70		6000	12.00	-
-	ท่อกลม GI (1-½")	OD 48.60		6000	13.74	-
-	ท่อกลม GI (2")	OD 60.50		6000	19.80	-
-	ท่อกลม GI (2-½")	OD 76.30		6000	25.14	-
-	ท่อกลม GI (3")	OD 89.10		6000	29.52	-
-	ท่อกลม GI (3-½")	OD 101.60		6000	33.78	-
-	ท่อกลม GI (4")	OD 114.30		6000	52.62	-
-	ท่อกลม GI (5")	OD 139.80		6000	64.62	-
-	ท่อกลม GI (6")	OD 165.20		6000	76.68	-
-	ท่อกลม GI (7")	OD 190.70		6000	88.74	-
-	ท่อกลม GI (8")	OD 216.30		6000	141.00	-

Pre-Zinc Pipe

Galvanized steel pipe, also known as pre-zinc pipe, is made from galvanized steel sheets that are slit to the required size, formed into a tube, and welded using Electric Resistance Welding (ERW).

These pipes are commonly used for:

Light structural work
Interior decoration
Electrical conduit
Indoor areas or low-corrosion environments

Features & Benefits

Lightweight and corrosion-resistant for basic use
No need for painting, saving time and labor
Smooth and shiny surface, ideal for visible installations
Eco-friendly and meets TIS 107-2566 and JIS standards
Suitable for structures, ceilings, solar farms, greenhouses, and carts
(Not recommended for water piping)

Available Shapes

Round Galvanized Pipe

Size ½ Inch (OD 21.7 mm) Thickness 2.00 mm Weight 0.972 kg/m
Size ¾ Inch (OD 27.2 mm) Thickness 2.00 mm Weight 1.24 kg/m
Size ¾ Inch (OD 27.2 mm) Thickness 2.10 mm Weight 1.29 kg/m
Size ¾ Inch (OD 27.2 mm) Thickness 2.20 mm Weight 1.35 kg/m
Size ¾ Inch (OD 27.2 mm) Thickness 2.30 mm Weight 1.41 kg/m
Size 1 Inch (OD 34.0 mm) Thickness 2.00 mm Weight 1.24 kg/m
Size 1 Inch (OD 34.0 mm) Thickness 2.10 mm Weight 1.65 kg/m
Size 1 Inch (OD 34.0 mm) Thickness 2.20 mm Weight 1.72 kg/m
Size 1 Inch (OD 34.0 mm) Thickness 2.30 mm Weight 1.79 kg/m
Size 1 ¼ Inch (OD 42.7 mm) Thickness 2.00 mm Weight 2.00 kg/m
Size 1 ¼ Inch (OD 42.7 mm) Thickness 2.10 mm Weight 2.10 kg/m
Size 1 ¼ Inch (OD 42.7 mm) Thickness 2.20 mm Weight 2.19 kg/m
Size 1 ¼ Inch (OD 42.7 mm) Thickness 2.30 mm Weight 2.29 kg/m
Size 1 ¼ Inch (OD 42.7 mm) Thickness 2.50 mm Weight 2.48 kg/m
Size 1 ½ Inch (OD 48.6 mm) Thickness 2.00 mm Weight 2.29 kg/m
Size 1 ½ Inch (OD 48.6 mm) Thickness 2.10 mm Weight 2.40 kg/m
Size 1 ½ Inch (OD 48.6 mm) Thickness 2.20 mm Weight 2.51 kg/m
Size 1 ½ Inch (OD 48.6 mm) Thickness 2.30 mm Weight 2.63 kg/m
Size 1 ½ Inch (OD 48.6 mm) Thickness 2.50 mm Weight 2.84 kg/m
Size 1 ½ Inch (OD 48.6 mm) Thickness 2.80 mm Weight 3.16 kg/m
Size 2 Inch (OD 60.5 mm) Thickness 2.30 mm Weight 3.30 kg/m
Size 2 Inch (OD 60.5 mm) Thickness 2.50 mm Weight 3.57 kg/m
Size 2 Inch (OD 60.5 mm) Thickness 2.80 mm Weight 3.98 kg/m
Size 2 Inch (OD 60.5 mm) Thickness 3.00 mm Weight 4.25 kg/m
Size 2 Inch (OD 60.5 mm) Thickness 3.20 mm Weight 4.52 kg/m
Size 2 ½ Inch (OD 76.3 mm) Thickness 2.30 mm Weight 4.19 kg/m
Size 2 ½ Inch (OD 76.3 mm) Thickness 2.50 mm Weight 4.54 kg/m
Size 2 ½ Inch (OD 76.3 mm) Thickness 2.80 mm Weight 5.08 kg/m
Size 2 ½ Inch (OD 76.3 mm) Thickness 3.00 mm Weight 5.42 kg/m
Size 2 ½ Inch (OD 76.3 mm) Thickness 3.20 mm Weight 5.77 kg/m
Size 3 Inch (OD 89.1 mm) Thickness 2.30 mm Weight 4.92 kg/m
Size 3 Inch (OD 89.1 mm) Thickness 2.50 mm Weight 5.33 kg/m
Size 3 Inch (OD 89.1 mm) Thickness 2.80 mm Weight 5.96 kg/m
Size 3 Inch (OD 89.1 mm) Thickness 3.00 mm Weight 6.36 kg/m
Size 3 Inch (OD 89.1 mm) Thickness 3.20 mm Weight 6.78 kg/m

Size 3 ½ Inch (OD 101.6 mm) Thickness 2.30 mm Weight 5.63 kg/m
Size 3 ½ Inch (OD 101.6 mm) Thickness 2.50 mm Weight 6.10 kg/m
Size 3 ½ Inch (OD 101.6 mm) Thickness 2.80 mm Weight 6.82 kg/m
Size 3 ½ Inch (OD 101.6 mm) Thickness 3.00 mm Weight 7.29 kg/m
Size 3 ½ Inch (OD 101.6 mm) Thickness 3.20 mm Weight 7.76 kg/m
Size 3 ½ Inch (OD 101.6 mm) Thickness 3.50 mm Weight 8.46 kg/m
Size 3 ½ Inch (OD 101.6 mm) Thickness 3.80 mm Weight 9.16 kg/m
Size 3 ½ Inch (OD 101.6 mm) Thickness 4.00 mm Weight 9.63 kg/m
Size 4 Inch (OD 114.3 mm) Thickness 3.20 mm Weight 8.77 kg/m
Size 4 Inch (OD 114.3 mm) Thickness 3.50 mm Weight 9.56 kg/m
Size 4 Inch (OD 114.3 mm) Thickness 3.80 mm Weight 10.35 kg/m
Size 4 Inch (OD 114.3 mm) Thickness 4.00 mm Weight 10.90 kg/m
Size 4 Inch (OD 114.3 mm) Thickness 4.30 mm Weight 11.66 kg/m
Size 4 Inch (OD 114.3 mm) Thickness 4.50 mm Weight 12.18 kg/m
Size 5 Inch (OD 139.8 mm) Thickness 3.20 mm Weight 10.77 kg/m
Size 5 Inch (OD 139.8 mm) Thickness 3.50 mm Weight 11.76 kg/m
Size 5 Inch (OD 139.8 mm) Thickness 3.80 mm Weight 12.74 kg/m
Size 5 Inch (OD 139.8 mm) Thickness 4.00 mm Weight 13.40 kg/m
Size 5 Inch (OD 139.8 mm) Thickness 4.30 mm Weight 14.36 kg/m
Size 5 Inch (OD 139.8 mm) Thickness 4.50 mm Weight 15.00 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 3.20 mm Weight 12.78 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 3.50 mm Weight 13.95 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 3.80 mm Weight 15.12 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 4.00 mm Weight 15.90 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 4.30 mm Weight 17.06 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 4.50 mm Weight 17.80 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 4.80 mm Weight 18.98 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 5.00 mm Weight 19.80 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 5.30 mm Weight 20.89 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 5.50 mm Weight 21.66 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 5.80 mm Weight 22.79 kg/m
Size 6 Inch (OD 165.2 mm) Thickness 6.00 mm Weight 23.60 kg/m

Size 7 Inch (OD 190.7 mm) Thickness 3.20 mm Weight 14.79 kg/m
Size 7 Inch (OD 190.7 mm) Thickness 3.50 mm Weight 16.15 kg/m
Size 7 Inch (OD 190.7 mm) Thickness 3.80 mm Weight 17.51 kg/m
Size 7 Inch (OD 190.7 mm) Thickness 4.00 mm Weight 18.41 kg/m
Size 7 Inch (OD 190.7 mm) Thickness 4.30 mm Weight 19.76 kg/m
Size 7 Inch (OD 190.7 mm) Thickness 4.50 mm Weight 20.70 kg/m
Size 8 Inch (OD 216.3 mm) Thickness 4.50 mm Weight 23.50 kg/m
Size 8 Inch (OD 216.3 mm) Thickness 4.80 mm Weight 25.03 kg/m
Size 8 Inch (OD 216.3 mm) Thickness 5.00 mm Weight 26.05 kg/m
Size 8 Inch (OD 216.3 mm) Thickness 5.30 mm Weight 27.57 kg/m
Size 8 Inch (OD 216.3 mm) Thickness 5.80 mm Weight 28.59 kg/m
Size 8 Inch (OD 216.3 mm) Thickness 6.00 mm Weight 30.10 kg/m

*Note: More sizes are available. Please contact us for details.

Tolerance on Outside Diameter and Wall Thickness

Division			Tolerance %
Outside Diameter	< 50 mm ≥ 50 mm		± 0.5 mm ± 1%
Wall Thickness	Welded Pipe	< 4 mm	+ 0.6 mm - 0.5 mm
		4 mm ≤ t ≤ 12 mm	+ 15% - 12.5%
		≥ 12 mm	+ 15% - 1.5 mm

Production Specs

Zinc coating thickness: 8.4 – 14 microns
Tensile strength: 270 – 300 N/mm²
Size range: ½ inch to 8 inches

Production Process of Galvanized Steel Pipes

COTCO METAL WORKS starts by taking hot-rolled steel sheets.
Then, they are coated with zinc through galvanizing.
After coating, the steel sheets are processed into specified shapes: round, square, and flat galvanized pipes.
The entire process meets international quality standards.

Why Choose COTCO METAL WORKS?

High-quality galvanized steel products
Wide size range for all projects
Competitive pricing
Certified with TIS 107-2566
Professional support and nationwide delivery

How much do galvanized steel pipes, square tubes, and flat bars cost?

Prices cannot be fixed as they vary depending on:
- Pipe diameter, length, and thickness
- Required production standards (e.g., TIS)
- Order quantity
- Global steel and zinc price fluctuations
- Shipping costs

COTCO METAL WORKS offers high-quality galvanized pipes and flat bars at competitive prices.

For an accurate quote:
- Contact our sales team with your specifications and quantity.
- We provide the latest prices and the best deals for your project.

Contact Us to Order or Inquire

LINE Official: @cotcometalworks
Call Center: 02-285-2700
Our team is ready to assist you every step of the way – from inquiry to delivery – ensuring a smooth and satisfying experience!
Email: salescenter@cotcometalworks.co.th
Facebook: Cotco Metal Works