**************** *■ *Z**K Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. Jawaharlal Nehru Step Out From the Old to the New mrjsssss^^w: ,_A» **************** BLANK PAGE <_ PROTECTED BY COPYRIGHT IS 8008 (Part 2) : 2003 T^ t\ ^ i f^fg^-ftf$lfe TFT 2 90 fesft fe c& fafcre 3T^aTT§ Indian Standard INJECTION MOULDED/MACHINED HIGH DENSITY POLYETHYLENE (HDPE) FITTINGS FOR POTABLE WATER SUPPLIES — SPECIFICATION PART 2 SPECIFIC REQUIREMENTS FOR 90° BEND ( First Revision ) ICS 83.140.30;91. 140.60 © BIS 2003 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 1 10002 October 2003 Price Group 1 Plastic Piping System Sectional Committee, CED 50 FOREWORD This Indian Standard (Part 2) (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Plastic Piping System Sectional Committee had been approved by the Civil Engineering Division Council. This standard covers general requirements for injection moulded/machined HDPE fittings which are used for connection by welding process to HDPE pipes covered by IS 4984 :1995 'High density polyethylene pipe for water supply (fourth revision)' . This standard was first published in 1976. Keeping in view the developments in this field and considering revision of IS 4984 this standard has been revised. The requirements of injection moulded/machined HDPE fittings are covered in nine parts. The other parts in this series are: (Part 1) (Part 3) (Part 4) (Part 5) (Part 6) (Part 7) (Part 8) (Part 9) 2003 General requirements for fittings 2003 Specific requirements for 90° tees 2003 Specific requirements for reducers 2003 Specific requirements for ferrule reducers 2003 Specific requirements for pipe ends 2003 Specific requirements for sandwich flanges 2003 Specific requirements for reducing tees 2003 Specific requirements for end caps All revised parts have been aligned with IS 4984 with respect to grade of material, dimensional requirements, testing procedures and sampling methodology. Provisions has been made for rewelding , in case any weld gets rejected. Weld length had been kept constant with a uniform tolerance. Drawings have been revised from short neck pipe ends to long neck pipe ends. The range of diameter of fittings, weld length and clarity of the dimensions in the drawings had been incorporated in each part of the standard, wherever applicable. This standard covers general requirements for materials, manufacture, dimensional, etc, for 90° bend. Fittings from 20 mm to 315 mm are manufactured by the injection moulding methods and machined, wherever so required and fittings of 355 mm and above shall be manufactured by machining process from thick walled extruded pipes or compression moulded slabs. For the purpose of deciding whether a particular requirement of this standard is complied with the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 'Rules for rounding off numerical values (revised)'. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. IS 8008 (Part 2) : 2003 Indian Standard INJECTION MOULDED/MACHINED HIGH DENSITY POLYETHYLENE (HDPE) FITTINGS FOR POTABLE WATER SUPPLIES — SPECIFICATION PART 2 SPECIFIC REQUIREMENTS FOR 90° BEND (First Revision ) 1 SCOPE This standard (Part 2) covers the specific requirements for materials, manufacture, dimensional and tolerances and marking for injection moulded and machined HDPE 90° bends for potable water supplies. 2 REFERENCE The following standard contains provisions which, through reference in this text, constitutes provisions of this standard. At the time of publication the editions indicated was valid. All standards are subject to revision and parties to agreements based on this standard is encouraged to investigate the possibility of applying the most recent edition of the standard indicated below: IS No. Title 8008 (Part 1) : Injection moulded/machined high 2003 density polyethylene ( HDPE ) fittings for potable water supplies Specification: Part 1 General requirements for fittings 3 REQUIREMENTS 3.1 General The general requirements for material, manufacture, grade, sizes, performance requirements, methods of test sampling and inspection shall conform to IS 8008 (Part 1). 90° bends from 20 mm to 160 mm shall be manufactured by the injection moulding methods and machined wherever so required. 3.2 Manufacture 3.2.1 A typical illustration of injection moulded 90° bend is shown in Fig. 1 . 3.2.2 Laying Length The overall laying length and tolerances thereon shall comply with those given in Table 1 read with Fig 1. 3.2.3 The outside diameters and wall thickness of fitting at ends shall comply with requirements given in 8 of IS 8008 (Part 1). 4 MARKING 4.1 Each 90° bend fitting shall be clearly marked at a prominent place, with the following information: a) Identification of source of manufacture, and b) The size of the fittings, grade of material and appropriate class (working pressure) to which the pressure rating of the fitting corresponds. 4.2 BIS Certification Marking Each 90° bend fitting may also be marked with the Standard Mark. 4.2.1 The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1 986 and the Rules and Regulations made thereunder. The details of conditions under which a licence for the use of the Standard Mark may be granted to the manufacturers or the producers may be obtained from the Bureau of Indian Standards. IS 8008 (Part 2) : 2003 Fig. 1 90° Bend Table 1 Dimensions for 90° Bends {Clause 3.2.2) Ail dimensions in millimetres. SI No. (1) Nominal Diameter Diameter for Manufacturing Reference Welding Length Laying Length D D, K Z (2) (3) (4) (5) 20 27 15 35 ±1 25 29 15 40 ±2 32 36.5 15 50 ±2 40 46.5 15 60 ±2 50 57 15 70 ±2 63 70.5 15 80 ±2 75 85 15 90 ±2 90 98 15 110±2 no 122 15 140 ±3 125 135 15 140 ±3 140 150 15 150 ±3 160 170 15 170±3 i) i'O iii) iv) v) vi) vii) viii) ix) x) xi) xii) NOTE — Tolerance on various dimensions are given below: Dimension Tolerances Diameter for manufacturing reference, D, ±2 mm Welding length, K ±3 mm Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyright BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publication), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of 'BIS Catalogue' and 'Standards: Monthly Additions'. This Indian Standard has been developed from Doc: No.CED 50 (5919). 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