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The ERW pipe starts with a coil or strip that goes through a roller machine. The spiral pipes start with coiled steel that has certain angle winded. The ERW or Electric Resistance Welded pipe seems to appear longitudinally and the spiral pipes have helix shaped structures at the extremities.
| Product Name | spiral seam welded corten and straight welded steel pipe | ||||
| Standard | API5L, ASTM A106 Gr.B, ASTM A53 Gr.B, ASTM A270, ASTM A249, ASTM A511,ASTM A778 ,ASTM A312,ASTM A358,ASTM A409,ASTM A213,ASTM A790,ASTM A268,ASTM A269,ASTM A554,ASTM B338,ASTM B673,ASTM B674,ASTM B677,ASTM B675, ASTM B676, ASTM B690,ASTM A928,ASME B36.19,ASMEB36.10,ASTMA179/A192/A213/A210/370WP91,WP11,WP2 | ||||
| GB5310-2009,GB3087-2008,GB6479-2013,GB9948-2013,GB/T8163-2008, GB8162-2008,GB/T17396-2009 | |||||
| EN10216-5,EN10217-7,DIN 17456,DIN 17458 | |||||
| JIS G3463,JIS G3119,JIS G3446,JIS G3218,JIS G3258,JIS G3448,JIS H4631 | |||||
| DEP 31,DEP 40,DEP 20,DEP 32,DNV-OS-F101 | |||||
| Grade | Q195 = S195 / A53 Grade A | ||||
| Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2 | |||||
| Q345 = S355JR / A500 Grade B Grade C | |||||
| Outer Diameter | ERW / HFW | LSAW / DSAW | SSAW / HSAW | RHS | SHS |
| 1/8 - 20 inch | 12 - 56 inch | 8 - 126 inch | 40 x 20 mm | 15 x 15 mm | |
| (10.3-508 mm) | (323.8-1,420 mm) | (219.1-3,200 mm) | -1,000 x 800 mm | -1,000× 1,000 mm | |
| Wall Thickness | 0.4 - 16 mm | 6.0 - 40 mm | 6.0 - 26 mm | 1.0 - 30 mm | 0.6 - 30 mm |
| Length | 5.8~12.0 m or as customized | ||||
| Surface Treatment | Prime quality (bared, oiled, color paint, 3LPE, or other anti-corrosive treatment) | ||||
| Inspection | With Chemical Composition and Mechanical Properties Analysis; | ||||
| Dimensional and Visual Inspection, also with Nondestructive Inspection. | |||||
| Application | Structure, Electric power transmission tower projects, Piling, Water, Oil & gas pipeline engineering, Mechanical industry, Municipal projects, Roads and its auxiliary facilities, etc. |
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