šŸ”„šŸ”„ Donā€™t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

šŸ”
BS EN 751-3:2022

BS EN 751-3:2022

$142.49

Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water – Unsintered PTFE tapes and PTFE strings

Published By Publication Date Number of Pages
BSI 2022 24
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. Weā€™re here to assist you 24/7.
Email:[email protected]

This document specifies requirements and test methods for unsintered polytetrafluorethylene (PTFE) tapes and polytetrafluorethylene (PTFE) strings (PTFE tapes or PTFE strings, for short) which are suitable for sealing threaded metallic joints as specified in EN 10226-1:2004. This document covers two classes of PTFE tapes and PTFE strings suitable for fine (F) and coarse (G) threads. The PTFE tapes and PTFE strings are used as sealing materials for metallic threaded joints in contact with 1st family gases (town gas), 2nd family gases (natural gas) and 3rd family gases (liquefied petroleum gases (LPG)) up to 500 kPa, up to 700 kPa for hot water of heating systems, and up to 20 kPa in gas appliances and their auxiliary equipment. The maximum working pressure covered in this document is 2000 kPa which is relevant to LPG storage. The temperature range is limited to āˆ’20 Ā°C to 125 Ā°C.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
4 Differentiation and classification of PTFE tapes and PTFE strings
4.1 Differentiation
4.2 Classification
10 5 Requirements
5.1 Requirements to be met by the PTFE tape and PTFE strings as received
5.1.1 General
5.1.2 Tape and string dimensions
5.1.2.1 Length
5.1.2.2 Width
5.1.2.3 Thickness
5.1.3 Mass
5.1.3.1 Mass per area for PTFE tapes
5.1.3.2 Mass per length for PTFE strings
11 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
5.2.1 Sealing properties
5.2.1.1 General
5.2.1.2 Tightness
5.2.1.3 Resistance to temperature cycling
5.2.2 Dismantling
12 6 Test samples and documentation
6.1 Test samples
6.2 Test documentation
7 Test methods
7.1 General
7.2 Test methods for PTFE tapes or PTFE strings as received
7.2.1 Test of general requirements
7.2.2 Measurement of dimensions
7.2.2.1 Length
7.2.2.2 Width
13 7.2.2.3 Thickness
7.2.3 Measurement of mass
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
7.2.4.1 Analytical method
14 7.2.4.2 Thermogravimetric method
7.2.5 Test of PTFE structure
7.2.6 Test of wrapping properties
7.2.6.1 PTFE tapes class F
15 7.2.6.2 PTFE tapes class G
16 7.2.6.3 PTFE strings class F
17 7.2.6.4 PTFE string class G
7.3 Test of PTFE tapes or PTFE strings after assembly
7.3.1 Test of sealing properties
7.3.1.1 Preparation of test assemblies
19 7.3.1.2 Tightness test
20 7.3.1.3 Temperature cycling test
21 7.3.2 Test of dismantling
8 Marking and instructions
8.1 Marking on packages
8.2 Instructions
22 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Regulation (EU) 2016/426 aimed to be covered

Related products

BS EN 751-3:2022
$142.49