1 This specification is under the jurisdiction of ASTM Committee A01 on Steel, 3 For referenced ASTM standards, visit the ASTM website, , or. Oshwin carries a complete line of ASTM A TP Stainless Steel Welded Tubes also in customized size & standard, available in both. What is the difference between ASTM A, A, A, and A Stainless steel tubing.

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ASTM A Stainless Steel Tubes, ASTM A SS Tubes, ASTM A Stainless Steel Tubes

Referenced Documents satm separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. You May Also Like. Fusion processes generate a molten puddle of metal that wets two edges of steel and is allowed to solidify to create a single weldment. In addition, room-temperature tensile and hardness tests are required to evaluate the material properties of the tube and to provide assurance of conformance to pressure vessel design criteria.

March 26, By: Thus a large proportion of A tube used in the Australian market is supplied in the atm polished or buffed conditions, in the range of about -or with a very highly polished Surfacetypically stated as Only then will the tube have the proper corrosion resistance, stability at temperature, and astmm properties needed for the most demanding applications.

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The strip-forming process and weld joint configuration must be very precise, and this often requires strip edge preparation. ASTM and ASME pressure tube specifications require destructive testing of random tube samples at designated intervals – – for example, every 1, feet meters – – of each production a429.

Our all ASTM A TP Stainless Steel Welded Tubes are tested in accordance to internationally recognized standards or our own more stringent internal test procedures, which is developed considering the harsh field conditions. Work done by Atlas Steels awtm that for 1. Detectable defects can be rooted in raw material problems, such as laminations or other flaws in the strip, or problems with the manufacturing process, such as weld penetration or integrity or forging.

Both sufficient cold work and proper annealing are necessary to complete the recrystallization process. Quality control inspection and testing of tubing should be extensive and can be categorized as nondestructive tests, mechanical tests, or corrosion tests.


For example, small additions of sulfur have been known to improve weldability, but excessive amounts may harm the ductility and formability of the product. In this example, the weld was attacked less than the base metal during the test. With weld bead rolling it would be expected that the finish of the weld would be similar to that of the parent tube.

Link to Active This link will always route to the current Active version of the standard. The food industry generally requires a tube with no weld bead remnant on the inside Surface if the intended service is handling product. Our stock range consists of the following:. The result is a solution-annealed, recrystallized weld and a clean tube that forms a naturally occurring passive surface oxide film as soon as it leaves the annealer and is exposed to oxygen in the atmosphere.

ASTM A249 Specifications

Conscientious suppliers may also do these tests with the weld in a transverse orientation as an added assurance. It is specifically directed at food industry applications, specifying the features necessary to ensure high integrity lines for hygienic applications without requiring high cost additional mechanical testing.

Oshwin is committed to upgrade the capabilities of its technical and administrative staff through formal training and continuous technical quality awareness. Single-seam, single- or double- welded austenitic pipe. Physical properties of the strip, as well as its chemistry, are specified and controlled tightly to ensure a quality tube.

Fenton joined Rath Manufacturing in The comparatively small weld puddle created by laser beam welding makes it difficult to achieve a robust manufacturing process. It has excellent corrosion resistance and forming characteristics. Slide Show 5 Images. In practice this is not a common requirement for food industry tube unless it requires significant bending or flaring.

There is also a requirement that the a429 Surface be smooth, with no lack of weld penetration and no crevices adjacent to welds. Another key benefit is the existence of matching specifications for associated tube fittings. We accept all small and large quantity orders Contact Us Require our products?

It is important to remember that each type of corrosion test is designed to give some indication of an alloys or alloy family’s suitability for a specific application environment and that a particular test may not be appropriate to a particular alloy or application. Therefore, fabricators and producers should be careful when specifying corrosion testing requirements. The tube has not been forged or annealed.


In conclusion, making a good-quality pressure tube starts with a well-specified raw material. These required mechanical manipulation tests include flattening a flare test for seamless tubeflange, and reverse bend tests see Figure 3. LATEST NEWS Method for processing precision stainless steel tube astmm What problems will occur with stainless steel tubes durin The Seamless tube-Stainless steel tube application Stainless steel seamless tube manufacturing process How to clean stainless steel tube pipe When asstm final heat treatment is in a ast, furnace, the number of tubes of the same size and from the same heat in a lot shall be determined from the prescribed size of the tubes.

An offline hydrogen atmosphere bright annealer can be used for alloys or specifications that require special anneal cycles. ASTM does asm give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to xstm.

Annealing is possible if required and Surface finishes can be further specified. The grain size of different grades of steel shall be determined in accordance with the test methods. Nondestructive and Mechanical Testing. Usually request inner polish as well as outer Surface s. All Projects require careful planning to ensure a good result and correct material selection. Combining values from the two systems may result in non-conformance with the standard.

The finish options available in this specification are very comprehensive. It will prove uncompetitive against un-annealed tube. Equipment used ranges from tape measures to laser micrometers. Annealing often is done on the tube mill and in a hydrogen atmosphere, which reduces surface q249 films and heat tint from welding. The internal Surface is required to be 2B finish, quoted as typically 0.