Seamless pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow - liquids and gases (fluids), slurries, powders and masses of small solids.
1. Steel tubing is a hollow steel shape intended for structural purposes and made from carbon, stainless, or galvanized steel further divided as:
· Mechanical Tubing is used in low stress applications such as fences, kitchens, restaurants, hospitals, solar panels and made with wall thicknesses up to 10 gauge.
· Structural Tubing is for high stress structural application like bridges, buildings, roll cages, and underwater platforms with wall thickness from 3/16" and up. It is often referred to as Hollow Structural Sections or just the acronym HSS.
2. Pipe is a hollow structure that is intended to carry material such as liquids, gasses, or even solids. Its wall thickness is described by its Schedule and it is often broken down by type using the method of manufacturing it, either ERW or Seamless.
Seamless pipe (and tubing) is made by extruding a steel block or by drilling a solid steel bar. Next, the extrusion or the drilled steel bar is cold drawn through a dye to achieve the diameter and thickness needed. Because this process can cause mechanical hardening, sometimes the material is annealed and straightened as a final process. Seamless Pipe & Tubing is subdivided as:
Cold Drawn Seamless, or CDS, exhibits precise tolerances and a good surface finish.
Hot Finished Seamless, or HFS, has less critical tolerances and somewhat scaly finish and is not as strong as CDS.
| Chemical composition of pipes for machining; | C 0.08~0.19 Mn 0.40~0.70 Si 0.17~0.37 S ≤0.035 P ≤0.035 Cr 0.40~0.70 Mo 0.40~0.55 Ni ≤0.30 |
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| Performance of pipes for machining; | Tensile strength)MPa:410~560 ~ 560 Yield point MPa:205 Elongation (%): 2 |
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| The purpose of the pipe for machining: | Compared with solid steel such as round steel, seamless steel pipe is lighter in weight when the bending and torsion strength is the same, and it is an economic cross-section steel, which is widely used to manufacture structural parts and mechanical parts, such as oil drill pipes, bicycle racks and steel scaffolding used in construction. | |||||||||||||||
| Tube for machining structure | |||||
| Variety classification | measure | Steel grade/brand | executive standard | application area | |
| Outside-Diameter (mm) | Wall-Thickness (mm) | ||||
| Structural pipe | 42~760 | 4~120 | 20#, 35#, 45#, Q345A/B/C/D, Q390, Q420, 25Mn, 27SiMn, etc. | GB/T 8162 | General structure with, Mechanical tube |
| Vehicle tube | 45~245 | 4~35 | 20Mn2,SAE1527,MZ410R,MZ530R,30Mn2,40Cr,45Mn2,etc. | YB/T5035, technical protocol |
Tube for automobile axle and automobile axle sleeve |
| Tube for die casting | DN200~DN1200 | 21CrMo10,21CrMo10-2,etc. | Q/OHAD030, technical protocol |
Centrifugal ductile iron pipe Tube die blank |
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| Military pipe | 42~760 | 4~120 | 30Cr,40Cr,35CrNi1MoA,etc. | Military standards and agreements | Military tube |
| Pipe for geological drilling | 42~133 | 4~25 | DZ40,DZ55,STM-R780,DZ60,etc. | Q/OHAD006, GB/T 9808 , technical protocol |
Drilling pipe |
| Pipe for hydraulic prop | 42~760 | 4~120 | 20#,35#,45#,27SiMn,30MnNbRE,30CrMnSi,30CrMnSiA,etc. | GB/T 17396, technical protocol |
Making hydraulic equipment for coal mining, hydraulic cylinders and plungers for truck cranes. |
| Fluid conveying pipe | 42~760 | 4~120 | 20#,Q345,Q390,etc. | GB/T 8163, technical protocol |
Used as a tube for conveying fluid. |
ASTM A106 Seamless Carbon Steel Pipe
ASTM A106/ASME SA106 is the standard specification for seamless carbon steel pipe applied for high temperature services. It includes three grades A, B and C, and common use grade is A106 Grade B. It used in different industries not only for pipeline systems like oil and gas, water, mineral slurry transmission, but also for boiler, construction, structural purposes.
ASTM A106 Grade B pipe is equivalent to ASTM A53 Grade B and API 5L B on chemical position and mechanical properties, in general use carbon steel and yiled strength minimum 240 MPa, tensile strength 415 Mpa.
Description
1. Standards: ASTM A106 (ASME SA106)
2. Products mainly used: apply to bending, curling and similar forming process.
3. The main products of steel / steel grade: Gr.A, Gr.B, Gr.C.
4. Specifications: diameter: 10.3 to 114.3 mm thickness: 0.8 to 12 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe.
5. Chemical composition and mechanical properties
6. JIS Number and Corrensponding Foreign Standards
| Grade | Chemical Compositions | |||||||||
| C | Mn | P | S | Si | Cr | Cu | Mo | Ni | V | |
| A106-A | ≤0.25 | 0.27-0.93 | ≤0.035 | ≤0.035 | ≥0.10 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.40 | ≤0.08 |
| A106-B | ≤0.30 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≥0.10 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.40 | ≤0.08 |
| A106-C | ≤0.35 | 0.29-1.06 | ≤0.035 | ≤0.035 | ≥0.10 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.40 | ≤0.08 |
| Grade | Mechanical Properties | |||||||||
| Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation(%) | ||||||||
| A106-A | ≥330 | ≥205 | 30 | |||||||
| A106-B | ≥415 | ≥240 | 30 | |||||||
| A106-C | ≥485 | ≥275 | 30 | |||||||
Packing and Shipping
Shipping--- by container (Apply to a few or common quantity) or in bulk ( Apply to huge quantity)
Container sizes:
20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)
40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)
40ft HC:12032mm(Lengh)x2352mm(Width)x2698mm(High)
For 20feet container load 25tons-28tons pipes whose max. length is 5.8m.
For40feet container load 25tons-26tons pipes whose max. length is 12m.
