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Standard Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
Automaticky preložený názov:
Štandardné praktiky pre rozptylovými tokmi vyšetrenie feromagnetických ocelí rúrkové výrobky
NORMA vydaná dňa 1.6.2009
Označenie normy: ASTM E570-09
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.6.2009
Kód tovaru: NS-47239
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
electromagnetic (eddy current) testing, ferromagnetic, flux leakage, NDT, nondestructive testing, steel, tubular products, Discontinuities--metals/alloys, Electromagnetic (eddy current) testing, Ferromagnetic pipe/tube, Flux leak testing, Leak testing, Nondestructive evaluation (NDE), Piping systems, Steel tube (nondestructive testing), Surface analysis--metals/alloys, Tubular products, ICS Number Code 77.040.20 (Non-destructive testing of metals)
Significance and Use | ||||||||||||
This practice outlines a procedure for examining ferromagnetic tubular products using the flux leakage method. If properly applied, this method is capable of detecting the presence and location of significant longitudinally or transversely oriented discontinuities such as pits, scabs, slivers, gouges, roll-ins, laps, seams, cracks, holes, and improper welds in ferromagnetic tubes under inspection. In addition, the severity of a discontinuity may be estimated and a rejection level set with respect to the magnitude of the electromagnetic indication produced by the discontinuity. The response from natural discontinuities can be significantly different from the response for artificial discontinuities such as drilled holes or notches of equivalent depth. For this reason, sufficient work should be done to determine the conditions necessary to detect and mark natural discontinuities whose characteristics will adversely affect the serviceability of the tube, in order to establish acceptance criteria between the supplier and purchaser. |
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1. Scope | ||||||||||||
1.1 This practice covers the application and standardization of equipment using the flux leakage test method for detection of outer surface, inner surface, and subsurface discontinuities in ferromagnetic steel tubular products (Note 1) of uniform cross section such as seamless and welded tubing. Note 1—The term “tube” or “tubular product” will be used to refer to both pipe and tubing. 1.2 This practice is intended for use on tubular products having outside diameters from approximately ½ to 24 in. (12.7 to 610 mm) with wall thicknesses to ½ in (12.7 mm). These techniques have been used for other sizes, however, and may be so specified upon contractual agreement between the purchaser and the supplier. 1.3 This practice does not establish acceptance criteria; they must be specified by the using parties. 1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.5 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||||||
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