| Customization: | Available |
|---|---|
| Application: | Automotive Industry, Chemical Industry, Oil and Gas Industry, Building Material |
| Certification: | CE, ISO9001 |
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| Aspect | Details |
|---|---|
| Standard Name | ASTM A270 - Standard Specification for Welded Austenitic Stainless Steel Sanitary Tubing |
| Scope | Designed for use in sanitary applications where cleanliness and resistance to corrosion are crucial, such as in the food, dairy, beverage, and pharmaceutical industries |
| Material | Austenitic stainless steels, often including grades like 304, 304L, 316, 316L. These materials offer excellent corrosion resistance, which is essential for maintaining the integrity of products in contact with the tubing |
| Dimensions | Specifies outer diameter, wall thickness, and length tolerances. For example, outer diameters typically range from a few inches down to small sizes suitable for delicate fluid transfer systems in the industries it serves. Precise tolerances ensure proper fit and function in various equipment |
| Weld Quality | Requires high - quality welds. Welds must be free from defects such as porosity, cracks, and incomplete fusion. Non - destructive testing methods, like visual inspection, pressure testing, and sometimes radiographic or ultrasonic testing, may be used to verify weld integrity |
| Surface Finish | Typically demands a smooth surface finish. This helps prevent the accumulation of contaminants, bacteria, and other substances that could affect the quality of products passing through the tubing. Common surface finishes include mechanical polishing and electropolishing |
| Testing and Inspection | In addition to weld and surface finish inspections, samples may be subjected to chemical analysis to confirm the correct alloy composition. Tensile testing may also be carried out to ensure the tubing meets the required mechanical strength standards |
ASTM A270 specification covers grades of seamless, welded, and heavily cold worked welded austenitic and ferritic/austenitic stainless steel sanitary tubing intended for use in the dairy and food industry and having special surface finishes. Pharmaceutical quality may be requested, as a supplementary requirement.
TP304 austenitic stainless steel sanitary tubing
2205 duplex stainless steel sanitary tubing
TP316L austenitic stainless steel sanitary tubing
UNS S31254 Pheavily cold worked sanitary tube
UNS S32750 seamless steel sanitary tube
UNS N08926 stainless steel sanitary tube
UNS N08367 steel tube
UNS S31803 welded steel tube
Standard: ASTM A270/A270M
Grade: TP304, TP304L, TP316, TP316L, S31254, N08926, N08367, S31803, S32205, S32750, S32003
Process: Seamless, Welded, Heavily Cold Worked Welded
Outside Diameter: 12.7 - 304.8mm
Wall Thickness: 1.5-3.4mm
Length:1000mm to 12000m
Manufacture
1. The tubes shall be manufactured by one of the following processes:
1.1 Seamless (SML) tubes shall be made by a process that does not involve welding at any stage.
1.2 Welded (WLD) tubes shall be made using an automated welding process with no addition of filler metal during the welding process.
1.3 Heavily cold worked (HCW) tubes shall be made by applying cold working of not less than 35 % reduction of the thickness of both walls and weld to a welded tube prior to the final anneal. No filler shall be used in making the weld. Prior to cold working, the weld shall be 100 % radiographically inspected in accordance with the requirements of ASME Boiler and Pressure Vessel Code Section VIII, Division 1, latest revision, Paragraph UW 51.
2. At the manufacturer's option, the tubing may be furnished either hot finished or cold finished.
Heat Treatment
1.1 All material shall be furnished in heat-treated condition. The heat treatment procedure, except for S31803, S32003, S32205, S32750, N08926 and N08367, shall consist of heating the material to a minimum temperature of 1900 °F [1040 °C] and quenching in water or rapid cooling by other means.
2.2 N08926 shall be heat-treated to a minimum temperature of 2010 °F [1100 °C] followed by quenching in water or rapidly cooling by other means. UNS N08367 should be solution annealed from 2025 °F [1110 °C] minimum followed by rapid quenching.
3.3 S31803 and S32205 shall be heat-treated in a temperature range of 1870 °F [1020 °C] to 2010 °F [1100 °C] followed by quenching in water or rapidly cooling by other means.
4.4 S32750 shall be heat-treated in a temperature range of 1880 °F [1025 °C] to 2060 °F [1125 °C] followed by quenching in water or rapidly cooling by other means.
4.5 S32003 shall be heat-treated in a temperature range of 1850 °F [1010 °C] to 2010 °F [1100 °C].
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