GB/T 23711.1-2019Test method for pressure vessels lined with plastics—Part 1:Spark testing (English PDF)

Foreword

GB/T 23711, Test method for pressure vessels lined with plastics, is divided into 8 parts:

-- Part 1: Spark testing;

-- Part 2: Low-temperature testing;

-- Part 3: High-temperature inspection;

-- Part 4: Negative pressure inspection;

-- Part 5: Cold-hot cycling inspection;

-- Part 6: Anti pressure testing;

-- Part 7: Leak testing;

-- Part 8: High-resistance testing.

This Part is the 1st part of GB/T 23711.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces GB/T 23711.1-2009, Spark test method for pressure vessels lined with fluoroplastics; compared with GB/T 23711.1-2009, the main technical changes, except editorial changes, are as follows:

-- In "Scope", add plastic lining materials such as rigid polyvinyl chloride (PVC-U), chlorinated polyvinyl chloride (PVC-C), polyethylene (PE) (see Chapter 1);

-- Delete the normative references (see Chapter 2 of version 2009);

-- Modify the expression of the principle (see Chapter 2, Chapter 3 of version 2009);

-- Modify the expression of test equipment (see Chapter 3, Chapter 4 of version 2009);

-- Add requirements for the accuracy level of voltmeters; add a note on the name of the spark detector (see 3.1);

-- Add requirements for the spark detector probe (see 3.2);

-- Modify requirements for the sample (see Chapter 4, Chapter 5 of version 2009);

1 Scope

This Part of GB/T 23711 specifies the principle, test equipment, sample, test method, test result judgment and test report of the spark testing of steel pressure vessels lined with plastics.

This Part applies to the spark testing of steel pressure vessels lined with plastics, such as rigid polyvinyl chloride (PVC-U), chlorinated polyvinyl chloride (PVC- C), polyethylene (PE), ethylene-tetrafluoroethylene copolymer (ETFE), fluorinated ethylene propylene (FEP), perfluoroalkoxy alkanes (PFA), polytetrafluoroethylene (PTFE), and polyvinylidene difluoride (PVDF), whose container shell material is steel.

2 Principle

For the spark detector, set a minimum test voltage; scan the plastic lining through the probe. When there are defects such as micropores and cracks in the plastic lining, they are broken down under the test voltage to form a short circuit, and the electric spark detector emits an alarm sound or a spark appears at the probe.

3 Test equipment