ขอใบเสนอราคา

รูปภาพสินค้า	ชื่อสินค้า	ขนาดสินค้า	ความหนา	ความยาว	น้ำหนักต่อเส้น (kg)
	ท่อประปา (1/2") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 21.30	2.60	6000	7.26
	ท่อประปา (3/4") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 26.90	2.60	6000	9.36
-	ท่อประปา (1") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 33.70	3.20	6000	14.46
	ท่อประปา (1-1/4") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 42.40	3.20	6000	18.60
	ท่อประปา (1-1/2") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 48.30	3.20	6000	21.36
-	ท่อประปา (2") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 60.30	3.60	6000	30.18
	ท่อประปา (2-1/2") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 76.10	3.60	6000	38.52
	ท่อประปา (3") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 88.90	4.00	6000	50.16
-	ท่อประปา (4") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 114.30	4.50	6000	73.20
	ท่อประปา (5") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 139.70	5.00	6000	99.60
	ท่อประปา (6") ท่อเหล็กชุบกัลวาไนซ์ (Hot-Dip Galvanized Steel Pipe)	OD 165.10	5.00	6000	118.80

Blow Type technology

Water Pipes & Hot-Dip Galvanized Steel Pipes

Hot-Dip Galvanized Steel Pipe is a steel pipe that has undergone a hot-dip galvanizing process to enhance corrosion resistance and extend its service life compared to ordinary steel pipes. These pipes are ideal for plumbing systems, structural work, and construction projects that require high strength and safety.

At COTCO METAL WORKS, we ensure quality in every production step, using an international-standard hot-dip galvanizing process. This guarantees that every pipe we produce is durable, reliable, and long-lasting.

Galvanized Steel Pipes (Hot-Dip Galvanized Pipes)

COTCO METAL WORKS galvanized pipes stand out for their quality and global standards, manufactured with a hot-dip galvanizing process fully controlled in-house. We are among the few manufacturers in Thailand with our own galvanizing bath and Blow Type technology, which ensures an even and smooth zinc coating across the pipe surface.
Our pipes are available in plain or threaded ends and in multiple grades to suit various needs, certified to:

ASTM A53
BIS 1139
DIN 2440
JIS G 3452
BS 1387
TIS 276-2562
UL 852 Standard for Fire Protection Metallic Sprinkler Pipes
CCM Standards:
- M® (Blue Stripe) for heavy-duty/high-pressure applications
- A1 (Yellow Stripe) for standard water systems

Product Specifications

Hot-dip galvanized pipes, commonly known as water pipes, are made from black steel coils, slitted, formed into pipes, welded, and then hot-dip galvanized in zinc baths with at least 98.5% zinc at 450°C. Zinc coating weight averages 450 g/m² (63 microns) as per TIS 276-2562.

Production Sizes:
(Outer Diameter, Thickness, and Weight per meter)

Normal Size		OD		Thickness	Weight
Size (Inch)	mm.	mm.	max	mm.	kg/m
½	15	21.0	21.8	2.6	1.12
¾	20	26.5	27.3	2.6	1.56
1”	25	33.2	34.2	3.2	2.41
1 ¼ “	32	42.0	42.9	3.2	3.10
1 ½ “	40	47.9	48.8	3.2	3.56
2”	50	59.7	60.8	3.6	5.03
2 ½ “	65	75.3	76.6	3.6	6.42
3”	80	88.0	89.5	4.0	8.36
4”	100	113.1	115.0	4.5	12.20
5”	125	138.5	140.8	5.0	16.60
6”	150	163.9	166.5	5.0	19.80
8”	200	216.9	221.3	8.2	36.80

Tolerance on Outside Diameter and Wall Thickness

Dimension Tolerances
Tensile Strength	Min 320 Mpa.
Elongation	Min 20%
Thickness	-12.50% : ± Not Limit
Weight	-8% : +10%

Applications

Plumbing and water supply systems
Irrigation and fluid transport
Outdoor electrical conduit
Structural steel works
Public utilities and infrastructure projects

Blue vs Yellow Stripe

Yellow Stripe: Medium thickness, standard pressure, suitable for general plumbing and light structural use
Blue Stripe: Extra-thick, high-pressure, ideal for underground or heavy-duty installations (roads, industrial zones)

Advantages of COTCO Hot-Dip Galvanized Pipes

Superior corrosion resistance
Strong and durable under high pressure
Long service life compared to black steel pipes
No need for additional anti-rust coating
Cost-effective over time
Certified to TIS, ASTM, BS standards

How to Choose the Right Pipe

Define application (water, structure, electrical)
Select by wall thickness (Yellow = medium, Blue = heavy-duty)
Check required standards (TIS, ASTM, BS)
Choose OD and wall thickness as per design specs
Select end type (plain or threaded)
Buy from a trusted manufacturer like COTCO

Production Process

Surface Preparation: Degreasing → Rinsing → Acid Pickling → Fluxing
Drying: Removes moisture
Hot-Dip Galvanizing: Immersed in molten zinc at 450°C
Quality Inspection: Coating thickness, adhesion, dimension check

Price

Price varies by size, thickness, standards, and quantity. Contact our sales team for a customized quotation.

Contact Us:

LINE: @cotcometalworks
Phone: +66 2-285-2700
Email: salescenter@cotcometalworks.co.th
Facebook: Cotco Metal Works

ตารางขนาดการผลิตท่อเหล็กประปาชุบกัลวาไนซ์

ขนาด ½ นิ้ว (OD 21.0 - 21.8 มม.) ความหนา 2.6 มม. น้ำหนัก 1.12 kg/m
ขนาด ¾ นิ้ว (OD 26.5 - 27.3 มม.) ความหนา 2.6 มม. น้ำหนัก 1.56 kg/m
ขนาด 1 นิ้ว (OD 33.2 - 34.2 มม.) ความหนา 3.2 มม. น้ำหนัก 2.41 kg/m
ขนาด 1 ¼ นิ้ว (OD 42.0 - 42.9 มม.) ความหนา 3.2 มม. น้ำหนัก 3.10 kg/m