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Pre-Galvanized Steel Pipe
Pre-Galvanized Steel Pipe Pre-Galvanized Steel Pipe Pre-Galvanized Steel Pipe Pre-Galvanized Steel Pipe

ERW Pre-Galvanized Steel Pipe

Welded steel pipe with a slightly thinner coating of zinc

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.

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Standard

  • ASTM A500
  • IS065
  • BS1387. BS1139
  • GBT 3091/3094 & GB/T13793

Applications

  • Greenhouse Pipe
  • Conduit Pipe
  • Furniture Pipe
  • Structural Tubing

Size

  • Outside Diameter:

    Round tube: 12mm to 100mm
    Square tube: 10×10mm to 75×75mm
    Rectangular tube: 20×40mm to 50×100mm

  • Wall Thickness: 0.8mm to 2.2mm
  • Zinc Coating: 30g/m²-100g/m²
  • Length:

    Regular length: 5.8m or 6m or 12m
    Custom cut-to-length: 2m to 12m

Pipe End
  • Pre-Galvanized Steel Pipe Plain End
  • Pre-Galvanized Steel Pipe Beveled End
  • Pre-Galvanized Steel Pipe Grooved End
  • Pre-Galvanized Steel Pipe Threaded End
Specifications
BS 1387-85 XL
BS 1387-85L
BS 1387-85 M
ASTM A53 GRADE A SCH40
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
ERW Steel Pipe Production Process
  • Leveling
  • Ends Cutting
  • Slitting
  • Recoiling
  • Coil Ramp
  • Uncoiling
  • Leveling
  • Ends Cutting
  • Trimming & Welding
  • Coil Accumulator
  • Strip Ultrasonic Testing (UT)
  • Forming
  • High Frequency Welding
  • Welding
  • Deburring
  • Seam Annealing
  • Air/Water Cooling
  • Sizing (Round Tube)
  • Online Ultrasonic Testing (U.S. Test)
  • Sizing (Square & Rectangular Tube)
  • Straightening
  • Flying Cut-off
  • Flattening Test
  • End Finishing
  • Hydrostatic Test
  • Appearance Inspection
  • Offline Ultrasonic Testing (U.S. Test)
  • Marking
  • Oil Coating
  • Packaging & Storage
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Other Steel Pipes
  • Round Steel Tube
    Round Steel Tube
  • Square/Rectangular Steel Tube
    Square/Rectangular Steel Tube
  • Hot-Dip Galvanized Steel Pipe
    Hot-Dip Galvanized Steel Pipe
  • Oil Coated Steel Pipe
    Oil Coated Steel Pipe
  • Painted Steel Pipe
    Painted Steel Pipe
  • Pre-Galvanized Steel Pipe
    Pre-Galvanized Steel Pipe
Value-Added Services
As an experienced manufacturer in the steel pipes, our commitment extends beyond merely supplying products.
  • Surface Finishing
    Surface Finishing
  • Pipe End Preparation
    Pipe End Preparation
  • Cut-To-Length Service
    Cut-To-Length Service
  • Packaging & Shipping
    Packaging & Shipping
Steel Tube Manufacturer

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.

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  • Annual production capacity reaches 500,000 tons.
  • Stainless steel processing experience 21 years
  • Production scale houses more than 20 production lines
CONTACT US

Sarah Li

sarah@chinasteelpipegroup.com

+86-21-51061751

+86-18975163275

+86-18975163275

  • PRODUCTS
  • ERW Steel Pipe
  • Spiral Welded Steel Pipe
  • Seamless Steel Pipe
  • Prestressing Strand (PC Strand)
  • Steel Coil & Wire Rod
  • APPLICATIONS
  • Fire Fighting Pipe
  • Conduit Pipe
  • Low Pressure Liquid Delivery Pipe
  • Greenhouse Pipe
  • Pipe Railing
  • Piling Pipe
  • VALUE-ADDED SERVICES
  • Surface Finishing
  • Pipe End Preparation
  • Cut-To-Length Service
  • Packaging & Shipping
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