Factory Direct Sales Seamless Carbon Steel Pipe SA179/SA192 Carbon Steel Seamless Pipes High Pressure Boiler Pipe
Can black steel pipe be welded?
Black steel pipe is not galvanized, so it is safe to weld.

Product Name | Square Steel Pipeand 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 the 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 |
Advantages | 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 | - | - | - |


