Socket screws

Fig. 2.7. Flat die of equipment for 5 m wide HDPE geomembranes. The die is fed by two extmders, connections far right The arrangement of the countersink screws on the top indicates the line of the coathanger-shaped duct. The choker bar can be adjusted by tlie nuts of the protruding bolts, and the die lips can be adjusted by the hexagon socket screws on the far left. The carpet of molten material leaves the die lip horizontally and is pulled into the gap between the two bottom rollers of the polishing roll stack. This and the following two figures courtesy Naue GmbH Co. KG...

Mg. 11, 56, 17 (Davies types) and Fig. 11, 56, 18 (double coil type) are examples of efficient double surface condensers. Fig. 11, 56, 19 depicts a screw type of condenser (Friedrich pattern) the jacket is usually 10, 15 or 25 cm. long and the cone and sockets are fil9 or 24 this highly efficient condenser is employed for both reflux and for downward distillation. 

Valve bodies are also standardized to mate with common piping connections flanged, butt-weld end, socket-weld end, and screwed end. Dimensional information for some of these joints and class pressure-temperature ratings are included in Sec. 10, Process Plant Piping. Control valves have their own standardized face-to-face dimensions that are governed by ISA Standards S75.03, 04, 12, 14, 15, 16, 20, and 22. Butterfly valves are also governed by API 609 and Manufacturers Standardization Society (MSS) SP-67 and 68. 

Threaded slip-on socket welding Lap joint Welding neck ANSIB16.1, screwed (125-lh)... 

Forged fittings made by boring out sohd forgings are available with socket-weld (Fig. 10-126) or with screwed ends in sizes through 4 in, but 2 in is the usual upper size hmit for use. ANSI B16.il—1973 gives minimum dimensions for socket-weld 3000- and 6000-lb classes and... 

If the distribution network consists of pipes with screwed rubber sockets and only the service pipes are of steel, these can be protected with zinc or magnesium anodes. This requires an insulating service clip near the insulating connection. It is usually sufficient just to insulate the stirrup of the service clip since the rubber seal of the service pipe acts as an insulator. In the United Kingdom, the protection of numerous service pipes has been proved with magnesium anodes [31]. 

Internal coatings are usually applied at the factory and no difficulty exists in field construction if flanges, screwed, or spigot and socket joints are used, nor is there any difficulty with welded pipes above, say, 750 mm diameter, where patching can be carried out on the joints from the inside. Repair of internal coating on smaller-bore welded pipes presents many problems, which have not yet been satisfactorily overcome for all conditions. 

Depending on the size, forged fittings are available with socket-weld (Fig. 10-129) or screwed ends in sizes 4 in and smaller however, 2 in is the upper size limit normally used. ASME B16.il gives minimum dimensions for Class 3000, 6000, and 9000 socket-weld fittings, and for Class 2000, 3000, and 6000 threaded fittings. The use of socket-weld and threaded fittings is restricted by the code. 

A setscrew is a headless screw with a hexagonal socket in one end. 

Fig. 2.16. The PlEgli valve. A stainless steel ball bearing, B orifice to be closed by A, C copper bellows, D cover-plate, E sharp annular ridge, F channel full of solder, G, H sockets for Housekeeper seals, J screws securing D to body of valve.

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