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About This Item
Full Description
1.1 This test method describes determination of the comparative corrosion preventative characteristics of materials used for applications to joints, couplings, irregular fittings, and patched areas in coated pipelines. The test method is applicable to materials whose principal function is to act as barriers between the pipe surface and surrounding soil environment.
1.2 The test method described employs measurements of leakage current, capacitance, and dissipation factor to indicate changes in the insulating effectiveness of joint and patching materials.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
Document History
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ASTM G18-07
Standard Test Method for Joints, Fittings, and Patches in Coated Pipelines- Historical Version
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ASTM G18-07(2013)
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Standard Test Method for Joints, Fittings, and Patches in Coated Pipelines- Most Recent
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ASTM G18-88(1998)
Standard Test Method for Joints, Fittings, and Patches in Coated Pipelines (Withdrawn 2007)- Historical Version