Aalco_Datasheet_St_St_BSP_Fittings

abc® Aalco is a registered trademark of Aalco Metals Ltd © Copyright: Aalco Metals Ltd, The Hersham Centre, Hersham Green, Hersham, Surrey KT12 4HP All Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the Mechanical property requirements vary widely with product form and product dimensions. For more complete details please refer to the relevant specification – Specifications for Stainless Steel are listed on a separate Datasheet. Stainless Steel Low Pressure BSP Fittings Guide 1. What is a Low Pressure BSP Fitting? ♦ BSP fittings are a family of fittings used to connect up threaded pipe and equipment. ♦ They are manufactured from pipe, bar, hollow bar, castings or forgings. ♦ The pipe to be threaded must have a wall thickness of Schedule 40S minimum. ♦ The fittings are used in non-critical, low pressure applications where welding is not possible or required. They therefore provide a relatively low cost method of connection. ♦ BSP fittings are usually fitted with a sealant (paste or tape such as PTFE) and are considered to be permanent pipe-work. ♦ Low Pressure BSP Fittings are rated at 150lb and are made to wrought iron specification BS1740. ♦ BSP fittings are made only in type 316. ♦ They are provided with a Certificate of Conformity only, and not a full Test Certificate. ♦ Sizes ½ to 3 inch are the most commonly used and thus the most readily available. 2. What is the thread form? External MALE threads are tapered and Internal FEMALE threads are parallel. The threads are cut to BS21: Part 1: 1985 and are called Whitworth Threads. See Section 4. abc® Aalco is a registered trademark of Aalco Metals Ltd © Copyright: Aalco Metals Ltd, The Hersham Centre, Hersham Green, Hersham, Surrey KT12 4HP All Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the Mechanical property requirements vary widely with product form and product dimensions. For more complete details please refer to the relevant specification – Specifications for Stainless Steel are listed on a separate Datasheet. 3. For what is each fitting used? Fitting Use / Notes Enables the pipe run to be turned through a right angle. Female thread both ends Enables the pipe run to be turned through 45 degrees. Female thread both ends Allows the connection of a branch at right angles from the main pipe run. Female thread at all three connections. Used to connect two pipes or fittings that have male threads. Female thread both ends. Used to connect two pipes or fittings that have male threads. Used when there is a confined space Female thread both ends. Fitting Use / Notes Used to connect two different sizes of pipe or fittings that have male threads. Female threads both ends Used to terminate a male threaded pipe run. Female threaded. Connects male threaded pipe or components. Used when easy or regular access is required e.g. for cleaning. Female thread both ends. Used to fix male threaded fittings. Female threaded. Connects a larger female threaded component to a smaller male threaded component. Male thread at large end and Female thread at small end. abc® Aalco is a registered trademark of Aalco Metals Ltd © Copyright: Aalco Metals Ltd, The Hersham Centre, Hersham Green, Hersham, Surrey KT12 4HP All Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the Mechanical property requirements vary widely with product form and product dimensions. For more complete details please refer to the relevant specification – Specifications for Stainless Steel are listed on a separate Datasheet. Fitting Use / Notes Used to connect two female threaded components. Male thread both ends. Hexagon Reducing Nipple Connects two female threaded components of different sizes. Male thread both ends. Used to connect two female threaded components of the same size. Male (taper) thread both ends. Parallel or Equal Nipple The only BSP fitting to have a Male Parallel thread. Used to connect female threaded components together Spigot or Welding Nipple Weld prepared at one end and Male thread at the other. Used to weld onto equipment that is to be connected to a female threaded component. Fitting Use / Notes Close Taper Nipple Used to connect two female threaded components. No land between the threads so shorter than a barrel nipple and thus used where space is restricted. Male thread both ends. Used to blank off female threaded outlet. Cannot be used to blank off a pipe directly as pipes only have male threads. Male threaded. Square Head Plug Used to blank off female threaded outlet. Cannot be used to blank off a pipe directly as pipes only have male threads. Male threaded. 90 Degree Bend This has a larger radius than a 90 Degree Elbow and is again used to turn the pipe run through a right angle. Female thread both ends. Hose Nipple Used to connect a hose to the system. Male thread one end and hose serrations at the other. abc® Aalco is a registered trademark of Aalco Metals Ltd © Copyright: Aalco Metals Ltd, The Hersham Centre, Hersham Green, Hersham, Surrey KT12 4HP All Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the Mechanical property requirements vary widely with product form and product dimensions. For more complete details please refer to the relevant specification – Specifications for Stainless Steel are listed on a separate Datasheet. 4. Whitworth Threads / British Standard Pipe Thread Nominal size of outlet Min O/D Min O/D of body behind external thread Min I/D of body behind internal thread No. of threads per inch in mm mm mm mm 1/8 6 15.0 9.8 8.6 28 ¼ 8 18.5 13.3 11.4 19 3/8 10 22.0 16.8 15.0 19 ½ 15 27.0 21.1 18.6 14 ¾ 20 32.5 26.6 24.1 14 1 25 39.5 33.4 30.3 11 1¼ 32 49.0 42.1 39.0 11 1½ 40 56.0 48.0 44.8 11 2 50 68.0 59.8 56.7 11 2½ 65 84.0 75.4 72.2 11 3 80 98.0 88.1 84.9 11 4 100 124.0 113.3 110.1 11 5 125 151.0 138.7 135.5 11 6 150 178.0 164.1 160.9 11 This information is based on our present knowledge and is given in good faith. However, no liability will be accepted by the Company is respect of any action taken by any third party in reliance thereon As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose. Any advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. Any contract between the Company and a customer will be subject to the Company’s Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.