Flanges. ANSI B16.1 Class 125 cast iron.
Flanges. Flanged connections shall also be provided on all equipments connections as necessary and required or as directed by the Independent Engineer. Flanges shall be of forged type and not casted. Connections shall be made by the correct number and size of the bolts and made with 3mm thick insertion rubber washer. Where hot water or steam connections are made insertion gasket shall be of 1.5 m thick compressed asbestos fibre gaskets approved by the Independent Engineer. Bolts hole diameter. For flange shall conform to match the specifications for C.I. sluice valve to IS 780-1984.
Flanges. Raised faced, ASTM-105. Small bore flanges shall be socket weld.
Flanges. Welding neck flanges conforming to IS 6392, ISO 7005-1 or BS 4504 Section 3.1 for a nominal pressure rating as required must be used in accordance to the design pressure at the place of the installation. The nominal size of flanges shall be in conformity to the equipment or pipe appurtenance with which they are to be used. The flange thickness and drilling shall conform to IS 6392, ISO 7005-1or BS4504 Section 3.1 . Flanges shall be provided at the end of pipes or special where sluice valves, blank flanges, tapers, etc., have to be introduced. The Contractor shall assemble the flanges in the exact position by marginal cutting, if necessary, so as to get the desired position of the valves, etc., either vertical or horizontal and shall then fully weld the flanges from both sides in such a way that no part of the welding protrudes beyond the face of the flanges. In case the welding protrudes beyond the flanges and if the Employer’s Representative instructs that such protrusions shall be removed, the Contractor shall file or chip them off. If required and when instructed by the Employer’s Representative, the Contractor shall provide and weld gusset stiffeners.
Flanges. 8.2.1 Weld Neck [B-16.5, ASTM A694 Gr.F-52 (Charpy), 125 AARH, RF] (End Thickness to match pipe thickness) Nos. 18" 600# 13 8.2.2 Weld Neck [B-16.5, ASTM A694 Gr.F-52 (Charpy), 125 AARH, RF] (End Thickness to match pipe thickness) Nos. 12" 600# 3
Flanges. Valves of sizes 80mm – 1000mm shall have flat flanges as per relevant IS. The flange-to- flange distances shall be as per IS 14846.
Flanges a. Flange faces shall be flat and true to a tolerance of +1/32-inch for tanks, and 1 percent of the
Flanges. Valves shall be flanged and the flange face at right angles to the valve centerline. Backside or valve flanges shall be machined or spot faced for proper seating of the head and nut. Flanges shall be machined on faces and edges as per IS 6392 or BS 4504 for PN 10 nominal pressure rating unless otherwise required. Flange drilling shall conform to IS 1538 / EN 1092. Face to face acc. to EN 558-1. Operation Depending on location the valves shall be electrically operated, or by manual hand wheel or key operation, clockwise closing unless specified otherwise by the Engineer In-charge. For valves greater than 350 mm diameter, gear operators shall be used. The direction of closing shall be clearly indicated on the hand wheel or body as appropriate. Manual operation of valves shall be so that the torque effort required to manually operating the hand wheel, lever or chain shall not exceed 20 kgm applied by an operator . Valves shall be provided with operating hand wheels, caps, extension spindles and valve boxes as required. Extended valve spindles shall have spindle guides and operating caps. For sluice valves up to 600mm diameter installed in underground chamber or otherwise not easily accessible, the Contractor shall furnish extension spindles and/or keys, or chains with extension oil cups or such similar fittings or appliances as many be required to permit easy access for proper operation, lubrication etc. valves shall be suitable for frequent operation as well as operation after long periods of idleness in either open or closed position. Unless detailed otherwise all hand wheels shall have the works “open” and “close” cast in English with arrows indicating the direction of rotation. All hand wheels shall be or a solid cast type or forged steel. The valve stem, thrust washers, screws, nuts and all other components exposed to the water shall be of a corrosion resistant grade or stainless steel. Valves shall be free from sharp projections. Some of the butterfly valves and sluice valves on pumping main (except scour valves on pumping main and the isolation valves for air valves) shall be electrically operated. The valves shall have arrangement for manual operation also, operated through a suitable gearbox, by hand wheel. Operation must be possible by one man against maximum design working pressure. Gate valves and butterfly valves shall be provided with position indicators, to show whether the valve is in the open or close position. Cast Iron Sluice Valves Sluice ...
Flanges. 1. Port Connection: ANSI 125 pound or 150 pound rated or greater. 2. Inlet and outlet ports shall be constructed of grey iron, or mild steel fittings and flanges bolted to
Flanges. Unless otherwise indicated flanges shall conform, in all respects, to the requirements of SANS 1123 appropriate for the class of valve specified. Should required sizes fall beyond the range of SANS 1123, flange dimensions shall confirm to the requirements as specified. The Contractor shall obtain written confirmation of required flange drilling from the Engineer prior to the commencement of manufacture. Sufficient clearance shall be allowed between the body of the valve and the flange to enable proper tightening of bolts. Tapped holes shall only be allowed in exceptional cases and with the Engineer's written consent.
