TP 304 316 316L stainless steel coiled tubing chemical component

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IntroductionSpecification Comparison Material Manufacturing Dimensional Tolerances Wall Thickness Outer Diameter Surface Finishing Weld Bead Heat Treatment 机械性能 Non-Destructive TestingWhich Specification

This article provides an alternative code for Australian food services. These specifications include:
ASTM A269 “Specification for General Purpose Seamless and Welded Austenitic Stainless Steel Tubing”
ASTM A249 “Specification for Austenitic Boiler, Superheater, Heat Exchanger, and Condenser Welded Tubes”
AS1528 was revised in 2001 by key stakeholders in the Australian food and pipe industry. AS 1528 is unique in that it covers all relevant fittings except pipes.
All specifications refer to common steel grades such as 304, 304L, 316 and 316L. AS1528.1 applies to all duplex and austenitic stainless steel grades listed in ASTM A240.
All sizes require fusion-welded products without filler metal. Specifications such as ASTM A270, ASTM A269 and AS 1528 also apply to seamless products.
AS 1528 specifies a nominal thickness of 1.6 mm for all outside diameters (OD) except 2 mm for 203.2 mm outside diameter; other thicknesses may be specified by the purchaser. Standard tolerance + zero, -0.10 mm. The full negative tolerance implies the common practice of producing pipes of all sizes closer to the lower limit of the tolerance range. A typical range is 1.52 to 1.58 mm. This tolerance also applies to fittings.
* Tolerances for ASTM A554 weld removal conditions. * AS1528 also applies to OD sizes 12.7, 19.0, 31.8, 127.0, 152.4 and 203.2 mm.
All of these pipe specifications specify limits on wall thickness and outside diameter. The inner diameter is not specified separately.
Surface treatment specifications of various sizes recommended for use in the Australian food industry are as follows:
The processing of products used in the food industry requires pipes without weld residues on the inner surface.
The mechanical properties of various grades of stainless steel commonly used in the food industry are as follows:
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