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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Filter bag, housing manufacturer finds faster cutting process for aluminum, carbon steel, stainless steel. Weld Bead The food industry generally requires a tube with no weld bead remnant on the inside Surface if the intended service is handling product. 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.

It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Surface finishes may also be specified in terms of Ra w249, but no limits are given in the specification.

Rath Manufacturing Company manufactures welded, full finished stainless, duplex, and nickel alloy pipe and tubing for the most demanding service in food, dairy, chemical, petrochemical, and other process environments. The finish options available in this specification are very comprehensive.

Only fusion welding processes should be used to produce high-quality stainless, duplex, and nickel-alloy pressure tubing that will be used in demanding a49 critical applications. The material shall conform to the prescribed tensile and hardness properties such as tensile strength, yield strength, elongation, and Rockwell hardness number.

For example, the ASTM AS7 weld decay test is considered widely to be a reliable corrosion test, but, in reality, the acid used in the test applies to less than 1 percent of real-life operational environments.


These tests are performed on samples that have welds in a longitudinal orientation. Annealing is possible if required and Surface finishes astk be further specified. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

Raw material specifications are an important factor in achieving a high-quality welded tube. Only then will the tube have the proper corrosion resistance, stability at temperature, and mechanical properties needed for the most demanding applications.

In practice this is not a common requirement for food industry tube unless it requires significant bending or flaring. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.

Note that the crystalline structure of the weld is very nearly the same as that of the base metal.

Combining values from the two systems may result in non-conformance with the standard. It is important to remember that each type q249 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.

SS It is the most widely used austenitic stainless steel.

ASTM A Specifications | Penn Stainless Products

Fenton adtm Rath Manufacturing in You May Also Like. Weld bead rolling is not generally possible in sizes below Note the as-cast structure of the weld compared to the base material. These required mechanical manipulation tests include flattening a flare test for seamless axtmflange, and reverse bend tests see Figure 3.

Last but not least, testing methods must be topnotch to ensure a top-quality product. Figure 1Laser welding can yield an as-cast structure in a pipe’s weld seam that is quite unlike that of the base material. Procurement and supply are significant factors contributing to this. Conversely, it does not specify internal asm bead removal, which generally is a food industry requirement. Historical Version s – view previous versions of standard.


The annealing mandatory in A will also not be required in most food applications.

ASTM A249 Specifications

When the final heat treatment is in a continuous 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.

Heat treatment is annealing also referred to as solution treatment or solution annealing. An offline hydrogen atmosphere bright annealer can aa249 used for alloys or specifications that require special anneal cycles.

We accept all small and large quantity orders Contact Us Require our products? If exact equivalents are needed original specifications satm be consulted. March 26, By: Dimensional inspection is performed online at the mill to ensure conformance to ASTM, ASME, company, or customer requirements, including dimensional tolerance of the tube outside diameter ODwall thickness, and length.

In order to guarantee these standards, we are certified in accordance with a294 strict guidelines of ISO Both sufficient cold work and proper annealing are necessary to complete the recrystallization process.

Batch traceability marking considered essential to validate many food and pharmaceutical plants is mandatory. In conclusion, making a good-quality pressure tube starts with a well-specified raw material. A high cost option.

All materials can be prepared for shipping by truck, by bulk vessel or container adtm. Full tensile and hardness testing is standard, as are flattening, flange and reverse bend.

Difference between ASTM A249, A269, A270, and A554 Stainless steel tubing

Our stock range consists of the following:. Link to Active This link will always route to the current Active version of the standard. Usually request inner polish as well as outer Surface s. The food industry generally requires a tube with no weld bead remnant on the inside Surface if the intended service is handling product.