Hot Selling ASTM A53 Erw Welded Round Steel Welding Mild Black Pipe Carbon Steel Pipe Manufacturer For Building Material
How long do black steel pipes last?
50 to 100 years
If the pipes are placed in highly corrosive conditions, they often last from 50 to 100 years. Black steel pipes are more likely to erode than galvanized pipes and for this reason, they tend to be used for transporting gas while galvanized pipes for carrying water.

Product Name | Square Steel Pipe and Rectangular steel tube |
Material | 16Mn,A106,A36,A210,ST35 St35.4 St35.8 St37 St37-2 ST37.4 St42 St42-2 St45 St45-4 St45-8 St52 |
Size | Size 15mm*15mm-500mm×500mm |
Standard | ASTM A500, ASTM A513 |
Certificates | ISO 9001:2008,SGS, BV, CCIC etc |
Wall thickness | 1mm-30mm |
Surface Treatment | black paint, varnish, oil, galvanized |
Marking | Standard marking, or according to your request. Marking Method: Spray white paint |
Pipe Length | 1. Single Random Length and double Random Length. 2. SRL:3M-5.8M DRL:10-11.8M or As clients requested length 3. fixed length(5.8m, 6m, 12m) |
Packaging | Loose package; Packaged in bundles(2Ton Max); bundled pipes with two slings at both end for easy loading and discharging; wooden cases; waterproof woven bag. |
Test | Chemical Component Analysis, Mechanical Properties, Technical Properties, Exterior Size Inspection |
Application | Structural projects; Trailers; Frames; Shelves; Racks; Ornamental |
Advantage | 1. Reasonable price with excellent quality 2. Abundant stock and prompt delivery 3. Rich supply and export experience, sincere service 4.Reliable forwarder, 2-hour away from port. |
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15 | 1/2” | 21.3 | 2.11 | 2.77 | 2 | 2.6 | - |
20 | 3/4” | 26.7 | 2.11 | 2.87 | 2.3 | 2.6 | 3.2 |
25 | 1” | 33.4 | 2.77 | 3.38 | 2.6 | 3.2 | 4 |
32 | 1-1/4” | 42.2 | 2.77 | 3.56 | 2.6 | 3.2 | 4 |
40 | 1-1/2” | 48.3 | 2.77 | 3.68 | 2.9 | 3.2 | 4 |
50 | 2” | 60.3 | 2.77 | 3.91 | 2.9 | 3.6 | 4.5 |
65 | 2-1/2” | 73 | 3.05 | 5.16 | 3.2 | 3.6 | 4.5 |
80 | 3” | 88.9 | 3.05 | 5.49 | 3.2 | 4 | 5 |
100 | 4” | 114.3 | 3.05 | 6.02 | 3.6 | 4.5 | 5.4 |
125 | 5” | 141.3 | 3.4 | 6.55 | - | 5 | 5.4 |
150 | 6” | 168.3 | 3.4 | 7.11 | - | 5 | 5.4 |
200 | 8” | 219.1 | 3.76 | 8.18 | - | - | - |


