Standardizing Water Works Brass Goods
Joint Report of Committees of American and New England Water Works and Brass Goods Manufacturers’ Associations on This Subject to Be Made to the Organizations Named
THE report which follows comes as a culmination to the campaign originated by FIRE AND WATER ENGINEERING looking toward the standardization of brass goods for water works, which was started in May, 1920. Previous to that time little had been done in bringing order out of chaos in the manufacture of these articles. A suggestion was made that the matter be taken up by the Montreal convention of the American Water Works Association, which opened on June 21, 1920, and FIRE AND WATER ENGINEERING sent out a query to the members just preceding that gathering asking their opinion as to the importance and desirability of standardization in brass goods for water works. The great mass of replies received were practically unanimous in expressing the wish of the water works men that something be done to end the confusion that existed through the practice of various departments and companies adopting special sizes and threads and in the standardization of this branch of water supply.
At the Montreal convention, Adolph Mueller read a paper on standardization and a committee was appointed to take the matter up with similar committees of the New England Water Works Association and the National Association of Brass Manufacturers. The personnel of these committees was as follows:
American Water Works Association—W. R. Edwards, assistant superintendent, Passaic Water Company, Paterson, N. J., and J. Walter Ackerman, superintendent of water board, Watertown, N. Y.
New England Water Works Association—David A. Heffernan, superintendent of water department, Milton, Mass.
National Association of Brass Manufacturers—Fred Mueller. of H. Mueller Manufacturing Company, and Fred Schulder, of United Brass Manufacturing Company.
The three committees since that time have devoted much attention and labor to the perfection of the specifications for standardizing brass goods and fittings for water works, and the result was the final meeting of the members in Bridgeport during the late convention of the New England Water Works Association and the completion of the specifications, which are to be submitted for the approval and final adoption of the three associations.
The report of the joint committees is as follows:
Bridgeport, Conn., September 14, 1921. Three committees on the Standardization of Brass Goods for Water Works, representing, respectively, the New England Water Works Association, the American Water Works Association, and the National Association of Brass Manufacturers, today met together at Bridgeport, Conn., and after a detailed discussion, unanimously adopted the following report to be presented to their respective organizations:
- On all brass goods intended for underground service, the metal mixture to be standardized, specifying definite limits of tolerance for each ingredient.
- That all essential dimensions be standardized and minimum weights specified.
- To eliminate from corporation cocks-—
- The 3/8-inch size.
- All round bodies.
- Female threaded outlet.
- Hex plug recess.
- Mueller coupling thread.
- Quarter bend coupling.
- Increasing size lead flange cocks.
- Lead flange cooks for 1-A lead.
- On the sizes smaller than 1 1/4-inch to eliminate square and hexes.
- Lead flange cocks for 1-A lead to be the same as those for 2-A lead, the 3-A lead pipe to be made with an outside diameter the same as standard outside diameter of 2-A lead, the difference in the thickness of the wall to he secured by reducing the inside diameter of the 3-A lead. This thickness should be such as to give the same resistance to rupture by internal pressure to each size in the series from nominal 1/2-inch to nominal 2-inch inclusive. All lead flange cocks to be designed to withstand the same pressure as the 3-A lead pipe.
- All corporation cocks to have two flat sides for wrench hold, and the sizes 1 1/2and 2-inch to have a hex on the inlet side.
- All lead flange corporation cocks to have lead flange coupling thread such as used by the H. Mueller Mfg. Co. for 2-A lead pipe.
- The thread on the inlet end of corporation cocks to be any one of the following three:
- The Mueller thread.
- The coarse thread for wood mains.
- The standard iron pipe thread.
- 8 Corporation cocks with Mueller inlet thread to have full bore, and on the outlet end, a Mueller screw plug thread, and either a lead flange coupling thread, as described under item 6, or a standard iron pipe coupling thread one size larger than the nominal size of the cock. On the 5/8-inch size this is to be a 1-inch thread. The length, taper, and number of threads of this iron pipe coupling thread, to be governed by the Briggs System of I. P. fittings.
- Corporation cocks with coarse thread for wood mains to have a full plain bore, and coupling threads as described under (a) of this item
- Corporation cocks with iron pipe inlet thread to be discouraged, and not to be made in a 5/8-inch size. The bore of the 1/2-inch cock to be 15/32-inch, of the 3/4-inch cock 11/16 inch, of the 1-inch cock 7/8-inch, and of the 2-inch cock to be 1-29/32-inch. The outlet end to be provided with a Mueller screw plug thread, and coupling threads described under (a) of this item.
- Couplings with male iron pipe thread at outlet end to have this thread one size smaller than thread in coupling nut.
- All couplings (including meter couplings), and all solder nipples to have full bore.
- In the matter of curb cocks, it is recommended—
- That the lead flange couplings correspond to those recommended for corporation cocks.
- To eliminate all male threads, fine threads, and all other special threads (this includes the Salt Lake City and the Fitchburg patterns).
- All curb cocks with check to close clockwise.
- Minneapolis thread on curb cocks to be standardized as follows: 1/2-, 5/8 and 3/4-inch cocks, l 1/2-inch I. P.; 1-inch cocks, 2-inch I. P.; 1 1/4-inch cocks, 2 1/2-inch I. P.; l 1/2-inch cocks, 3-inch I. P.; and 2-inch cocks, 3 1/2-inch I. P.
The American Association of Brass Manufacturers to be requested to submit suitable specifications, covering items 1 and 2, for approval to the above mentioned Water Works Associations.
Also to discourage the use of the 1/2-inch and the 5/8-inch sizes.
(Continued on page 598)
(Continued from page 583)
(Signed) DAVID A. HEFFERNAN, of Milton, Mass.
Representing the New England Water Works Assn. W. R. EDWARDS, of Paterson, N. J.
J. WALTER ACKERMAN, of Watertown, N. Y.
Representing the American Water Works Assn. FRED MUELLER, of H. Mueller Mfg. Co.
FRED SCHULDER, of United Brass Mfg. Co. Representing the National Assn, of Brass Mfrs.