BS ISO 14743-2020 pdf free download.Pneumatic fluid power — Push-in connectors for thermoplastic tubes
This document specifies the general requirements and test methods for the design and performance of push-in connectors for use with thermoplastic tubes with outside diameters (OD) from 3 mm to 16 mm including dimensions in inches.
This document is intended to establish uniform methods of testing complete push-in connector assemblies as used in pneumatic fluid power applications. It is not applicable to air braking systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances and designation
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
ISO 5598, Fluid power systems and components — Vocabulary
ISO 8573-1:2010, Compressed air — Part 1: Contaminants and purity classes
ISO 10619-1, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1: Bending tests at ambient temperature
ISO 16030, Pneumatic fluid power — Connections — Ports and stud ends
ANSI/ASME B1.1, Unified Inch Screw Threads, (UN and UNR Thread Form)
ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch
ANSI/ASME B1.20.3, Dryseal Pipe Threads (Inch)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5598 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
4 Working conditions
Push-in connectors shall provide connections from –0,09 MPa [–0,9 bar 1) ] to a working pressure of 1,6 MPa (16 bar) when used at temperatures between –20 °C and +80 °C.
The connector assembly shall meet the performance requirements given in Clause 9 with tubes specified in Annex A and Annex B.
When tubing with a lower rated pressure is used, the maximum working pressure of the tube and connector assembly shall be that of the tubing.
In road vehicles, it is necessary to exercise special care to ensure that these connectors are never used in an air braking system.
5 Features
Design is optional to the manufacturer. Two examples are shown in Figure 1.
6 OD of tube
The OD of the tube shall be chosen from the following range of sizes:
3 mm, 1/8 in (3,17 mm), 4 mm (5/32 in), 6 mm, 1/4 in (6,35 mm), 8 mm (5/16 in), 10 mm, 3/8 in (9,52 mm), 12 mm, 1/2 in (12,7 mm), 14 mm, and 16 mm (5/8 in).
7 Design
7.1 Push-in connector dimensions shown in Figures 2 to 7 shall conform to the dimensions given in Tables 1 to 7.
7.2 Hexagon tolerances across flats shall be in accordance with ISO 4759-1, Grade C. The minimum hexagon across-corner turn diameter of 1,092 times the normal across flats dimension shall be used.
7.3 For connectors with the thread M and G, thread and stud end shall be in accordance with ISO 16030.
For connector with the thread R, thread and stud end shall be in accordance with ISO 7-1.
For connector with NPT thread, thread and stud end shall be in accordance with ANSI/ASME B1.20.1 and ANSI/ASME B1.20.3.
For connector with UNF thread, thread and stud end shall be in accordance with ANSI/ASME B1.1.
7.4 Details of contour shall be at the option of the manufacturer if the dimensions given in the Tables are maintained.
8 Marking
Each push-in connector shall be permanently marked with the minimum following information:
a) manufacturer’s/supplier’s name or trademark;
b) the OD of the tube which it is to be used with the push-in connector.
9 Performance requirements and testing
9.1 General
9.1.1 This clause establishes minimum qualification requirements for tensile load, pressure capabilities,leakage, connection forces, disconnection forces and cyclic endurance (impulse) for pneumatic push-in connectors for use with thermoplastic tubes.
9.1.2 Unless otherwise specified, tests shall be conducted at room temperature (23 °C ± 5 °C) and relative humidity level of 65 % ± 5 %.
9.1.3 Unless otherwise specified, a tolerance of ±5 % applies to all test characteristics.
9.2 Test samples
9.2.1 Three test samples shall be subjected to the proof and burst pressure tests; six test samples shall be subjected to all other tests.
9.2.2 Prior to testing, the tube sample shall be a minimum of two weeks (336 h) old.
9.2.3 Test samples shall consist of a push-in connector connected to the test tubing defined in Annex A and Annex B. Except for 9.6 and 9.7, the tubes for the test samples shall be cut to provide a length that is 20 times the OD of the tube between the two ends of the connectors when connected. The tubes shall be connected in accordance with the connector manufacturer’s specification.BS ISO 14743 pdf download