Home > Products > Seamless Steel Pipe > American standard steel pipe, Specifications:21.3*1.65, A106ASeamless pipe
American standard steel pipe, Specifications:21.3*1.65, A106ASeamless pipe
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- American standard steel pipe, Specifications:168.3×7.11, A106DSeamless pipe
- American standard steel pipe, Specifications:21.3*2.77, A106DSeamless pipe
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- American standard steel pipe, Specifications:559.0*28.58, A106ASeamless pipe
- American standard steel pipe, Specifications:48.3×1.65, A106DSeamless pipe
- American standard steel pipe, Specifications:273.1*9.27, A106ASeamless pipe
Product Details
Alloy Or Not: | Non-alloy | Special Pipe: | API Pipe | Surface Treatment: | Other, no |
Certification: | API | Technique: | Hot Rolled | Application: | Boiler Pipe |
Secondary Or Not: | Non-secondary | Place of Origin: | China | Section Shape: | Other, circular |
Thickness: | 1, 70 |
Product Description
American standard steel pipe, Specifications:21.3*1.65, A106ASeamless pipe
A106 is only produced as a seamless product and is available in three grades; A, B, C. There are no Types in A106 because it is produced only as a seamless product. A53 comes in two grades and three types. A53 can be produced as a seamless product (A53 Grade A Type S (Seamless) and A53 Grade B Type S (Seamless) or as a welded product (A53 Grade B Type E (Welded), A53 Grade A Type E (Welded) or A53 Grade A Type F (Welded)). Seamless pipe is often made by drawing a solid shape over a mandrel to form the configuration of a tube. Welded pipe is more commonly made by rolling a flat strip of material into a tube and joining the edges together with a longitudinal weld. The weld can be made by either Electric Resistance Welding (Type E) or by Furnace Butt Welded/Continuous Welding (Type F). The ASTM A106 specification is for seamless carbon steel pipe for High-Temperature Service. A106 must be produced with killed steel 2. It covers nominal pipe sizes (NPS) 1/8” NPS to 48 NPS”. For sizes 1- 1/2” NPS and under, A106 may be produced by two different processes; either hot finished or cold drawn. Unless otherwise specified, pipe 2″ NPS and over shall be furnished hot finished. Typical uses for A106 are for handling liquids and gasses at high temperatures and pressures in power plants, oil refineries, and industrial facilities. The ASTM A53 specification is for steel pipe of welded or seamless construction, and available in black or hot-dipped zinc-coating (aka galvanized) 3. A53 does not require the use of killed steel as a starting material. It covers nominal pipe sizes 1/8” NPS to NPS 26” NPS. It is incumbent upon a purchaser to request the grade and type, whether black or galvanized, and the desired end configuration. A53 does not require nor prohibit any specific process (such as hot finished or cold drawn or other process) in the production of seamless pipe. Typical uses of A53 pipe are structural applications or for low pressure fluid systems such as air, gas, and water. Since A106 seamless can be hot finished or cold drawn, in very, very basic terms the difference between the two is a matter of the temperature at which the process is performed. Hot finished pipe is produced at temperatures over about 1700F° while cold drawn is produced at much lower temperatures and with more processing. In general, cold drawn pipe has an improved surface finish and better dimensional control.4 As one can see in the Chemical Composition Chart below it is first important to identify the actual specifications and grades by the revision years to effectively compare. Here we will compare the ASTM A106-15 in both the B and C grades to ASTM A53-12 Grade B in Type S (Seamless). As one can see in the charts below, there are no major differences in chemistry and mechanical properties that would prevent a mill from producing a pipe that will meet these requirements of A106 Grade B and A53 Grade B Type S (Seamless). Now let’s look at the chemistry nuances as there is a more to review.5 First, the specified elements within the two specifications are not the same. A53B does not have a requirement for minimum silicon content (although silicon can be present); for A106, however, the minimum silicon content is 0.10%. Silicon is regarded as an important element for improving the heat resistance ability. The manganese, phosphorous and sulfur requirements are different, but the maximums are quite high and material rarely approaches these values. The remaining elements are the same for the B grades. As for the mechanical properties, A106-15 Grade B and A53-12 Grade B Seamless have the same tensile strength, yield strength and the same elongation values in 2” NPS when tested with a longitudinal strip test specimen. What then are the differences between A106 grades B and C?6 The maximum allowable carbon content is higher in Grade C; which can result in higher mechanical properties due to this increased carbon content. An engineer may be interested in this higher tensile and yield strength provided by Grade C when selecting materials for high temperature service. Regarding the need for heat treatment, the only requirements are A106 requires cold drawn material to be stress relieved at 1200°F or higher. A53 Grades A and B seamless products do not require heat treatment at all. Additional points where differences exist between A106 and A53 include weight, dimensions, and end finish. For A53, the weight of any pipe shall not vary more than 10% from its specified weight. For A106, the mass of any length of pipe shall not vary more than 10% over and 3.5% under that specified. Dimensions are different and may be more restrictive in either specification; depending on the or
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