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eLibrary > BS EN 751-3:2022 Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Unsintered PTFE tapes and PTFE strings >

BS EN 751-3:2022 Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Unsintered PTFE tapes and PTFE strings, 2022

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BS EN 751-3:2022 Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Unsintered PTFE tapes and PTFE strings, 2022

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1 Scope
2 Normative references
3 Terms and definitions
4 Differentiation and classification of PTFE tapes and PTFE strings [Go to Page]
4.1 Differentiation
4.2 Classification
5 Requirements [Go to Page]
5.1 Requirements to be met by the PTFE tape and PTFE strings as received [Go to Page]
5.1.1 General
5.1.2 Tape and string dimensions [Go to Page]
5.1.2.1 Length
5.1.2.2 Width
5.1.2.3 Thickness
5.1.3 Mass [Go to Page]
5.1.3.1 Mass per area for PTFE tapes
5.1.3.2 Mass per length for PTFE strings
5.1.4 Residual lubricant content
5.1.5 PTFE structure and material
5.1.6 Wrapping properties
5.2 Requirements to be met by the PTFE tape and PTFE string after assembly [Go to Page]
5.2.1 Sealing properties [Go to Page]
5.2.1.1 General
5.2.1.2 Tightness
5.2.1.3 Resistance to temperature cycling
5.2.2 Dismantling
6 Test samples and documentation [Go to Page]
6.1 Test samples
6.2 Test documentation
7 Test methods [Go to Page]
7.1 General
7.2 Test methods for PTFE tapes or PTFE strings as received [Go to Page]
7.2.1 Test of general requirements
7.2.2 Measurement of dimensions [Go to Page]
7.2.2.1 Length
7.2.2.2 Width
7.2.2.3 Thickness
7.2.3 Measurement of mass [Go to Page]
7.2.3.1 Measurement of mass per area for PTFE tapes
7.2.3.2 Measurement of mass per length for PTFE strings
7.2.4 Determination of residual lubricant content [Go to Page]
7.2.4.1 Analytical method
7.2.4.2 Thermogravimetric method
7.2.5 Test of PTFE structure
7.2.6 Test of wrapping properties [Go to Page]
7.2.6.1 PTFE tapes class F
7.2.6.2 PTFE tapes class G
7.2.6.3 PTFE strings class F
7.2.6.4 PTFE string class G
7.3 Test of PTFE tapes or PTFE strings after assembly [Go to Page]
7.3.1 Test of sealing properties [Go to Page]
7.3.1.1 Preparation of test assemblies
7.3.1.2 Tightness test
7.3.1.3 Temperature cycling test
7.3.2 Test of dismantling
8 Marking and instructions [Go to Page]
8.1 Marking on packages
8.2 Instructions
Annex ZA (informative)Relationship between this European Standard and the essential requirements of Regulation (EU) 2016/426 aimed to be covered [Go to Page]

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BS EN 751-3:2022 Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Unsintered PTFE tapes and PTFE strings, 2022

⨯To continue with accurate pricing,
please select your company type below: