Laserfiche WebLink
7/2011 <br />15060 - 6 <br />specified in Section 3.1 above. <br />Restrained joints using field welding, set screws, or gaskets with expanding metal inserts will not <br />be acceptable. <br /> <br />The restraining components, when not cast integrally with the pipe and fittings, shall be ductile iron <br />or a high strength non-corrosive alloy steel. <br /> <br />Tee head bolts and hexagonal nuts for all restrained joints in pipe and fittings shall be of high <br />strength low-alloy steel with composition, dimensions and threading as specified in ANSI/AWWA <br />Standard C111/A21.11-00, except that the length of the bolts shall meet the requirements for the <br />restrained joint design. <br /> <br />The proper number of gaskets, bolts, nuts and all necessary joint material, plus one extra gasket <br />for every 10 joints or fraction thereof, shall be furnished with each order. The gaskets and joint <br />accessories shall be shipped in suitable protection containers. <br /> <br />Each thrust-resistant joint and the pipe and fitting of which it is a part, shall be designed to <br />withstand the axial thrust from an internal pipeline pressure of at least 150 psi at bulkhead <br />conditions without reduction because of its position in the pipeline nor for support from external <br />thrust blocks. <br /> <br />Restrained push-on joint pipe and fittings shall be capable of being deflected after assembly. <br />During deflection, all components in the restrained system shall be in contact to provide an equal <br />force on all contact areas. <br /> <br />When restrained spigot ends are ordered for items of Group A, the corresponding bell ends of the <br />pipe to be restrained (also within Group A), shall be furnished with the required matching <br />restraining features at no additional cost other than the price bid per foot of pipe. <br /> <br />Flanged Joints <br /> <br />Connecting pieces with one end flanged and the other end either plain-end or mechanical joint, <br />shall conform to ANSI/AWWA Standard C110/A21.10-98. Joint material for both the flanged end <br />and the mechanical joint accessories for connecting pieces with a mechanical joint end shall be <br />furnished as specified. <br /> <br />Flange adapters shall be used only on a restricted basis and shall not be used as a general <br />substitute for regular flanged joints. Further, the Department absolutely reserves the right to require <br />regular flanged or other types of joint when it is considered in the Department’s best interest. The <br />decision of the Engineer shall be final in such situation. Flanges shall be made of ductile iron <br />conforming with ASTM 536. Flange shall be restrained by a number of individual gripping wedges <br />operated by torque-limiting actuating screws. Each flange adapter shall have a permanently cast in <br />identification number allowing tracing of the date, foundry and pour that fabricated the unit together <br />with all test data for the material of the pour. Records for this purpose shall be retained by the <br />foundry for a minimum of two years after the pour date and shall be supplied to the Department <br />within no more than two weeks after request. Factor of safety shall be a minimum of 2 to 1. <br /> <br />Other types of flanged fittings, and flanged pipe, shall conform to the following requirements unless <br />otherwise stated in the order: <br /> <br />Flanged fittings shall conform to ANSI/AWWA Standard C110/A21.10-98, as specified <br />hereinabove.