Document 3QmxLXYdLq2r3XQ9BVEvkyoon

678 CHAPTER 26 1958 Guide of manufacture. Note that the joint factor, c, is not included for plain end non-ferrous pipe as listed in Table 2. In addition to IPS copper pipe, several varieties of copper tubing are in use with either flared or compression couplings or soldered joints. Dimen sions of copper water tubing intended for plumbing, underground water service, fuel-oil lines, gas lines, etc., have been standardized by the U. S. Government and the American Society for Testing Materials. Table 4. Threading Data fob Pipe NoiONAIi Sue* Pipe 0. D. Standard Weight Extra and Double Extra Strong Threads COUPLING Coupling Threads Coupling -Coupling per Inch6 O. D. Length per Inch O. D. Length H 0-405 27 0.563 Mo 27 0.563 IMs H 0.540 18 0.719 IMo 18 0.719 lH H 0.675 18 0.875 lMfl 18 0.875 1M a 0.840 14 1.063 1M 14 1.063 m H 1.050 14 1.313 1H 14 _1.313 3H 1 1.315 11M 1.576 2 HW 1.576 m M 1.660 llH 1.900 2Ma 11H 2.054 2M W 1.900 11*4 2.200 2H im 2.200 2H 2 2.375 UM 2.750 2H 11*4 2.875 2H 2H 2.875 8 3.250 3H 8 3.375 4H 3 3.500 8 4.000 3M 8 4.000 *H 3H 4.000 8 4.625 3H 8 4.625 4H 4 4.500 8 5.000 3M 8 5.200 4H 5 5.563 8 6.296 3M 8 6.296 4H 6 6.625 8 7.390 4 8 7.390 m _ _8 8.625 _ 8 9.625 6H 10 10.750 -- -- -- 8 11.750 W _12 L2.75Q ' -- -- -8 14.000 _14 14.000 -- -- 8 15.000 6M 16 16.000 -- -- -- 8 17.000 m 18 18.000 20 20.000 _ _8 19.000 7H. -- -- 8 21.000 . w* * All in innhftfl, 6 Taper of threads ia in. per ft on diameter on all sizes of pipe* and in couplings of 2J4 in- and over. Couplings 2 in. and smaller are straight tapped. 0 5.562 for copper and red brass pipe. . Note: The wall.thickness and inside diameter shown in Table 1 do not apply to oopper and red brass pipd* Copper tube is classified in accordance with the wall thickness as follows. TypeK--Heavy Wall. Type L--Medium Wall. Type M--Light Wall. Type DWV--Light Wall--for drainage, waste, and vent service. In general, Type K is used for underground services and for general plumbing service where corrosion conditions are severe. Type L is used for general plumbing and heating service where conditions may be con;, sidered normal. Type M is used for sanitary drainage and other non;, pressure applications, for heating, and sometimes for other services less severe than those for which Types K or L are recommended. Type DW V: is of fighter weight than Type M, and is used for sanitary drainage an.. Pipe, Fittings, Welding 679 other non-pressure applications. Type DWV tube should not be used underground. Type L is suitable for underground drainage applications. Unless adequately protected, no copper tube should be embedded in a cinder fill. Where flexibility is essential as in hidden replacement work, or where as few joints as possible are desired as in fuel-oil lines, the soft temper is commonly used. In new or exposed work copper tube of a hard temper is generally used. All three types are extensively used with soldered fittings. Standard dimensions, weights, and diameter and wall-thickness toler ances for these classes of copper tube are obtainable from Table 2. Copper pipe is also available with dimensions of steel pipe. In refrigeration fines, used in connection with air conditioning equip ment, copper tube is used extensively. For refrigeration use where tube absolutely free from scale apd dirt is required, bright annealed copper tube that has been cleaned, dehydrated and sealed is used. This-tube is available in a variety of sizes and wall thicknesses. Table 5. Normal Engagement of Tight-Fit Male and Female Pipe Threads For American Standard and API Pipe Threads Pipe Size Engaged Length* In. Pipe Sues Engaged Length* In. Pipe Sizes Engaged Length* In. *4 M 1M >M 6 4 JW MH 1H >H 5 1W H% 2 6 1H MH m M* 8 *4 31 10 m 1 >Ho ` 3H IMe 12 lH * Oii^nmon shown is the normal tight-fit thread engagement from the leading edge of the female thread oack to the leading edge of the male thread. No allowance has been made for threading variations. THREADING PRACTICE in threaded pipe for heating and ventilating installations the American standard taper pipe thread, ASA B2.1-1945 is used. This thread is cut with a taper of 1 in 16 measured on the diameter of the pipe so as to secure ioint- .The number of threads per inch varies with the pipe size, hreads for fittings are the same, except that it is regular practice to furnish straight tapped couplings for Schedule 40 pipe 2 in. and smaller. For steam pressures in excess of 25 psi, it is recommended that taper-tapped couplings be used to obtain a tight joint. These may be secured by order- mth? which is used for oil piping, the couplings of which are provided *j i threads and may be used with regular mill-threaded A S/I RoWe'^? PiPe- Thread lengths should be in accordance with Tof Ti Right-hand threads are used unless otherwise ordered, nmwi draina8e> some elbows have the thread tapped at an angle to p vide a pitch of the connecting pipe of in. to the foot. These elbows are thrp^oj 6 .*'rade as pitch elbows and are commercially available. All rpt-,,- t PTe joints should be made up with a thread paste suitable for the service for which the pipe is to be used. stronv 6 j contains pertinent threading data for standard weight, extra p.nmi*TM double extra strong steel, and wrought-iron pipe. The normal S gement of pipe threads is given in Table 5.