Q195 Q215 Q235 Longitudinally Welded Pipe
Q195 welded pipe is used to transport low-pressure fluid. Generally, welded pipes are made of Q195A, Q215A, and Q235A steel. It can also be made of other mild steels that are easily weldable. Steel pipes are subject to hydraulic pressure, bending, flattening and other experiments, and have certain requirements for surface quality. The delivery length is usually 4-10m, and delivery of fixed length (or multiple lengths) is often required. The specifications of welded pipes are expressed in nominal diameter (millimeters or inches). The nominal diameter is different from the actual. According to the specified wall thickness, there are two kinds of welded pipes: ordinary steel pipes and thickened steel pipes.
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Q195 Q215 Q235 Longitudinally Welded Pipe
Products Description
Q235 steel pipe is used to transport low-pressure fluid. This type of steel is generally smelted in a converter or an open hearth. Its main raw materials are molten iron and scrap steel. The sulfur and phosphorus content in the steel is higher than that of high-quality carbon structural steel. Generally, sulfur is ≤0.050% and phosphorus is ≤0.045%. Q195 steel pipe is carbon structural steel, production process: arc welded pipe, resistance welded pipe, gas welded pipe, furnace welded pipe. Q215 steel pipe is a kind of carbon structural steel (GB/700-1999), Q--yield, 215--the minimum yield point (σs) value of this brand. This type of steel is generally smelted in a converter or an open hearth. Its main raw materials are molten iron and scrap steel. The sulfur and phosphorus content in the steel is higher than that of high-quality carbon structural steel. Generally, sulfur is ≤0.050% and phosphorus is ≤0.045%. The content of other alloying elements brought into the steel from raw materials, such as chromium, nickel, and copper, generally does not exceed 0.30%. According to the composition and performance requirements, the grades of this type of steel include Q195, Q215A, B, Q235A, B, C, and D. Q255A, B, Q275 and other steel grades are represented.
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Outer Diameter |
406-1524mm |
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Wall Thickness |
8-60mm |
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Length |
3-12M according to client requirement |
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Standard |
EN10255, EN10219, EN10210, EN39, BS1387, ASTM A53, ASTM A500, ASTM A36, API 5L, ISO 65 JIS G3444,DIN 3444, ANSI C80.1, AS 1074, GB/T 3091 |
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Material |
Gr.A, Gr.B, Gr.C, S235, S275, S355, A36, SS400, Q195, Q235, Q345 |
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Certificate |
API 5L, ISO 9001:2008,SGS, BV, etc |
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Surface treatment |
Oil/ Painted with black / varnish lacquer / Epoxy painting / FBE coating /3PE coating |
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Pipe End |
Plain end/ Bevel end |
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Packing |
OD not less than 273mm: Loose packing,piece by piece. |
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Techinical |
LSAW (Longigudinally Submerged Arc welding) |
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Welded Carbon Steel Pipe
Q195 Q215 Q235 Carbon Steel Pipe Composition
| Grade | Chemical Composition | |||||
| C | Mn | Si | S | P | ||
| Q195 | 0.06-0.12 | 0.25-0.50 | ≤0.30 | ≤0.045 | ≤0.05 | |
| Q215 | 0.09-0.15 | 0.25-0.55 | ≤0.30 | ≤0.05 | ≤0.045 | |
| Q235 | 0.12-0.20 | 0.30-0.67 | ≤0.30 | ≤0.045 | ≤0.04 | |
| Q345 | ≤0.20 | 1.00-1.60 | ≤0.55 | ≤0.04 | ≤0.04 | |
Steel Grade Q195 Q215 Q235 Pipe Mechanical Properties
(N/mm2 = Mpa)
| Grade | Yield Strength | Tensile Strength |
| Q195 | 195 | 315-430 |
| Q215 | 215 | 335-450 |
| Q235 | 235 | 370-500 |
| Q275 | 275 | 410-540 |
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