GB/T 23711.2-2019Test method for pressure vessels lined with plastics—Part 2:Low-temperature 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 2nd 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 23711.2-2009, Low temperature test method for pressure vessels lined with fluoroplastics; compared with GB/T 23711.2-2009, the main technical changes, except editorial changes, are as follows:

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

-- Modify contents of the normative references (see Chapter 2, Chapter 2 of version 2009);

-- Add the principle (see Chapter 3);

-- Add requirements for test chambers and tensile testing machines (see Chapter 4);

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

-- Add requirements for labels and the like on the sample when there is anisotropy on the dimensions and materials of the sample (see 5.1 and 5.2, Chapter 4 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 low-temperature testing of steel pressure vessels lined with plastics.

This Part applies to the low-temperature 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 Normative references

The following documents are indispensable for the application of this document.

For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 1040.2, Plastic. Determination of tensile properties - Part 2: Test conditions for moulding and extrusion plastic

GB/T 10592, Specification for low/high temperature test chambers

JB/T 7797-2017, Tensile testing machines for rubber and plastics

3 Principle

Cycle the sample at low temperature and room temperature; repeat for three cycles according to the prescribed time; perform tests of shape, dimensional change rate and mechanical property on the sample, so as to determine the low-temperature resistance of the steel pressure vessels lined with plastics.

4 Test equipment

7 Test result judgment