ERW pre-galvanized steel pipes, also known as mill galvanized pipes, are recognized for their bright, smooth, and aesthetically pleasing appearance. These pipes are coated with a thinner layer of zinc compared to traditional galvanized steel, making them a cost-effective solution for various applications. Despite the lighter zinc coating, they still offer adequate protection against corrosion.
Pre-galvanized steel pipes are tailored to support projects where both budget and visual appeal are important.
Round tube: 12mm to 100mm
Square tube: 10×10mm to 75×75mm
Rectangular tube: 20×40mm to 50×100mm
Regular length: 5.8m or 6m or 12m
Custom cut-to-length: 2m to 12m
British Standards: BS 1387-85 XL | |||||
DN | Designation of Thread | Outside Diameter | Wall Thickness | ||
(mm) | (inch) | (mm) | (inch) | ||
15 | 1/2 | 21.40-21.00 | 0.843-0.827 | 1.80 | 0.071 |
20 | 3/4' | 26.90-26.40 | 1.059-1.039 | 2.00 | 0.079 |
25 | 1' | 33.80-33.20 | 1.331-1.307 | 2.00 | 0.079 |
32 | 1-1/4' | 4250-41.90 | 1673-1.650 | 2.00 | 0.079 |
40 | 1-1/2' | 48.40-47.80 | 1.906-1.882 | 2.3 | 0.091 |
50 | 2' | 60.20-59.60 | 2.370-2.346 | 2.30 | 0.091 |
65 | 2-1/2' | 76.00-7520 | 2.992-2.961 | 2.60 | 0.102 |
80 | 3' | 88.70-87.90 | 3.492-3.461 | 2.60 | 0.102 |
100 | 4' | 113.90-113.00 | 4.484-4.449 | 3.20 | 0.126 |
British Standards: BS 1387-85L | |||||
DN | Designation of Thread | Outside Diameter | Wall Thickness | ||
(mm) | (inch) | (mm) | (inch) | ||
15 | 1/2' | 21.40-21.00 | 0.843-0.827 | 2.00 | 0.079 |
20 | 3/4' | 26.90-26.40 | 1.059-1.039 | 2.30 | 0.091 |
25 | 1' | 33.80-33.20 | 1.331-1.307 | 2.60 | 0.102 |
32 | 1-1/4' | 4250-41.90 | 1.673-1.65 | 2.60 | 0.102 |
40 | 1-1/2' | 48.40-47.80 | 1.906-1.882 | 2.90 | 0.11 |
50 | 2' | 60.20-59.60 | 2.370-2.346 | 2.90 | 0.114 |
65 | 2-1/2' | 76.00-75.20 | 2.992-2.961 | 3.2 | 0.126 |
80 | 3' | 88.70-87.90 | 3.492-3.461 | 3.20 | 0.126 |
100 | 4' | 113.90=113.00 | 4.484-4.449 | 3.60 | 0.142 |
British Standards: BS 1387-85 M | ||||||
DN | Designation of Thread | Outside Diameter | Wall Thickness | |||
(mm) | (inch) | (mm) | (inch) | |||
15 | 1/2' | 21.70-21.10 | 0.854-0.831 | 2.6 | 0.102 | |
20 | 3/4' | 27.20-26.60 | 1.071-1.047 | 2.6 | 0.102 | |
25 | 1' | 34.20-33.40 | 1.346-1.315 | 3.2 | 0.126 | |
32 | 1-1/4' | 42.90-42.10 | 1.689-1.657 | 3.2 | 0.126 | |
40 | 1-1/2' | 48.80-48.00 | 1.921-1.890 | 3.2 | 0.126 | |
50 | 2' | 60.80-59.80 | 2.394-2.354 | 3.6 | 0.142 | |
65 | 2-1/2' | 76.60-75.40 | 3.016-2.969 | 3.6 | 0.142 | |
80 | 3' | 89.50-88.10 | 3.524-3.469 | 4 | 0.157 | |
100 | 4' | 114.90-113.30 | 4.524-4.461 | 4.5 | 0.177 | |
150 | 6' | 166.10-164.10 | 6.539-6.461 | 5 | 0.197 |
ANSI Standards: ASTM A53 GRADE A SCH40 | ||||
NPS | Outside Diameter | Wall Thickness | ||
(mm) | (inch) | (mm) | (inch) | |
1/2' | 21.30 | 0.840 | 2.77 | 0.109 |
3/4' | 26.70 | 1.050 | 2.87 | 0.113 |
1' | 33.40 | 1.315 | 3.38 | 0.133 |
1-1/4' | 42.20 | 1.660 | 3.56 | 0.140 |
1-1/2' | 48.30 | 1.900 | 3.68 | 0.145 |
2' | 60.30 | 2.375 | 3.91 | 0.154 |
2-1/2' | 73.00 | 2.875 | 5.16 | 0.203 |
3' | 88.90 | 3.500 | 5.49 | 0.216 |
4' | 114.30 | 4.500 | 6.02 | 0.237 |
6' | 168.30 | 6.625 | 7.11 | 0.280 |
8' | 219.10 | 8.625 | 8.18 | 0.322 |
Have a question or need advice? Our team has the expertise to recommend the right solution.
Established in 2003, China Steel Pipe Group Corp.,Ltd . is a manufacturer in the steel pipes and PC strand wire industry. Our primary products include ERW pipes, SSAW pipes, LSAW pipes, high-precision welded pipes, prestressed steel wires, and prestressed steel strands. We also offer extensive processing services such as welding, grooving, threading, painting, and coating to meet your specific requirements. Our steel products are widely used in firefighting, cable management, material transportation, steel structures, railings, piling, construction, and machinery manufacturing.
Read More