Seamless steel pipes are widely used. General-purpose seamless steel pipes are rolled from ordinary carbon structural steel, low-alloy structural steel or alloy structural steel, and have the largest output. They are mainly used as pipelines or structural parts for conveying fluids.
According to different purposes, it can be supplied in three categories:
a. Supply according to chemical composition and mechanical properties;
b. According to mechanical performance;
c. According to the water pressure test supply. The steel pipes supplied according to category a and b shall be subjected to hydraulic test if they are used to withstand liquid pressure.
Special-purpose seamless pipes include seamless pipes for boilers, chemical and electric power, seamless steel pipes for geology, and seamless pipes for petroleum.
Seamless steel pipes have a hollow section and are used in large quantities as pipelines for conveying fluids, such as pipelines for conveying oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, steel pipe is lighter in flexural and torsional strength, and is a kind of economical section steel.
Widely used in the manufacture of structural parts and mechanical parts, such as automobile transmission shafts, bicycle frames and steel scaffolds used in construction, to make ring parts with steel pipes, which can improve material utilization, simplify manufacturing procedures, and save materials and processing man-hours. Made of steel pipes.
Q represents the yield limit of this material, and the latter 235 refers to the yield value of this material, which is around 235MPa. The combined version will decrease its yield value as the thickness of the material weight increases. Due to the moderate carbon content, the overall performance is better, the strength, plasticity and welding properties are better matched, and the use is the most extensive. Q195 is a carbon structural steel. The yield strength is 195MPA. Lower strength than Q235. The price is cheaper. Used in construction, structure, motorcycle frame, etc. The American ASTM brand is Gr.B (σs185). σs185 is the yield strength of 185MPa.
Q195 Steel Pipe Specifications
| Production Range | · SSAW OD: 219mm – 3120mm WT: 3mm – 25mm· LSAW OD: 16″-64″ WT: max 50mm· ERW OD: 1/8″-24″ WT: max 26.5mm · SMLS |
| Codes and Standards | ANSI, ASME, ASTM, API, SAE, BS, AGA, AWWA, ISO, DIN |
| Dimensions | ASME/ ANSI B36.10 / 19 |
| Pipe schedules | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Producing techniques | Seamless / ERW / Welded / Fabricated / CDW / EFW |
| Available Shapes | Round, Half Round, Square, Rectangular or Custom shape |
| Length | 3 to Max18 Meters or custom |
| End | Beveled End, Plain End, Treaded |
| Test Certificate | EN 10204 3.1 B |
| Length | Random Length / Fixed Length / SRL / DRL |
| Usage | Mechanical Tubing Liquid Transport Steel Pipe General structure, mechanical structure Transport liquid, gas, oil |
| Test | · Chemical Component Analysis
· Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation) · Technical Properties (Flattening Test, Blow Test, Impact Test, Flaring Test, Bending Test, Hardness Test etc) · Exterior Size Inspection · Nondestructive Test (Ultrasonic flaw detector, Eddy current flaw detector) · Hydrostatic Test |
| Surface | Fusion bond Expoxy Coating / Coal Tar Expoxy / 3PE / Varnish Coating Bitumen Coating / Black Oil Coating as per customer’s requirement |
| Mill Test Certificate | EN 10204/3.1B |
Q195 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 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 |
Q195 is used to manufacture anchor bolts, ploughshares, chimneys, roof panels, rivets, low-carbon steel wires, thin plates, welded pipes, tie rods, hooks, brackets, welded structures, etc. Rolled sheet and wire rod.
Cold and hot rolled thin steel plates and galvanized, tinned and plastic composite thin steel plates made from them are widely used in roof panels, decorative panels, general dust removal pipes, packaging containers, iron drums, instrument cases, switch boxes, and protection Covers, train cars, etc. Wire rods are mostly cold drawn into low-carbon steel wire or galvanized into galvanized low-carbon steel wire, which is used for binding, tensioning and fixing, or used as wire mesh, rivets, etc.
