264 



THE INDIA RUBBER WORLD 



ANLAKV 1, 1921 



WAR DEPARTMENT SPECIFICATIONS FOR ME- 

 CHANICAL RUBBER GOODS— IV' 



WAR Department Specifications No. 333-1-1, frequently re- 

 ferred to ill the following specifications, were published in 

 The India Rubber World January 1, 1920. 



LABORATORY TUBING 



War Department Specification. No. 333-1-lS — June S, 1919 



(AUTHORITV OF SlPPLV t IRCLLAa .No. >'. 1'. S. & T. Div., Ja.vuarv 24. 1919) 



Gener.\l. — (o) This specification covers the requirements for 

 compounded and pure-gum tubing for use in chemical laboratories. 



(b) See War Department Specification No. 333-1-1, headed 

 General Specification for Mechanical Rubber Goods', which is 

 made a part hereof, except in such cases as the provisions below 

 directly conflict. In such cases the word and meaning of this speci- 

 fication will govern. 



Construction. — See General Specifications. 



(a) Dimensions as follows : 



Compounded Pure Gum 



, * N , * , 



I. D. Wall Thickness I. D. Wall Thickness 

 Inch Inch Inch Inch 

 1/ 8 1/32 1/ 8 1/32 

 3/16 1/16 3/16 3/64 

 1/. 4 1/16 1/ 4 1/16 

 1/4 1/8 3/8 5/64 

 .... 1/2 3/31 



(b) Lengths of the compounded tubing to be as specified; 

 that of pure gum will l>e in 12^-foot lengths. 



(f) Method of manufacture shall be optional with manufac- 

 turer provided a tubing of the quality desired is produced. 



Branding. — No branding required. 



Material.- — See General Specifications. 



(a) Compounded tubing shall contain not less than 40 per cent 

 of fine Para rubber ; remainder to consist of such ingredients as 

 will insure good aging qualities and service. 



(fc) Pure-gum tubing shall contain not less than 92 per cent 

 fine Para, not more than 5 per cent sulphur. Remainder of the 

 compound shall consist of such ingredients as will insure good 

 aging qualities and service. The use of reclaimed rubber is not 

 permitted. 



Inspection. — See General Specifications. 



(a) Inspector may cut at random a 4-foot section from each 

 lot of 1,000 feet or less. 



Tests. — See General Specifications and following table. 



(n) Test specimens shall be '4 by 1 inch at constricted part. 



Table 



Per Cent Set 



Ultimate Set After 10 



Tensile Klongation, Stretch for Minute Rest, 



Minimum Minimum 10 Minutes Maximum 



Pounds Inches Inches 



Compounded 1,300 l-5"4 l-i'A 25 



Pure gum 1,300' 1-8 1-7 12 



CLOTH INSERTION TUBING 



War Department Speciflcation. No. 333-1-16 — June 6, 1919 

 fAuTHOHlTY OF SUPPLY CiSCLl-AR No. 8. P. S. & T. DiV., jANUA«y 24. 1919) 



General. — (o) This specification covers the requirements for 

 C. I. tubing for general use. 



(6) See War Department Specification No. 333-1-1, headed 

 General Specification for Mechanical Rubber Goods', which is 

 made a part hereof, except in such cases as the provisions below 

 directly conflict. In such cases the word and meaning of this 

 specification will govern. 



Construction. — See General Specifications. 



Dimensions. — (a) See the following table. 



Branding. — See See General Specifications. 



(a) Use letters "C. I." 



Material. — See General Specifications. 



(a) Fabric plies shall be of sheeting or a plain weave fabric 

 weighing not less than 454 ounces per square yard. 



Inspection. — See General Specifications. 



Tests. — See General Specifications and following table. 



Table 



Size 1/8-Inch 3/16-Inch 1/4. Inch 



t'abric, plies, minimum 2 3 4 



Thickness: 



Tube, minimum inch 3/64 3/64 3/64 



Cover, minimum i»ch 1/64 1/32 1/32 



Ultimate elongation, tube and cover, 



minimum inches 2-6 2_6 2—6 



> Continued from The India Rubber \\'orld, September 1, 1920, pages 

 805-808. 

 •See The India Rubber World, January 1, 1920, page 214. 



Teiuile: 



Tube, minimum pounds 500 500 50# 



Cover, minimum pounds 450 450 450 



WHITE MACHINE RUBBER TUBING 



War Department Speciflcation, No. 338-1-17 — June fi. 1919 



(AuTBORlTV OF St rpi.v CIRCULAR No. 8. P. S. & T. Dlv., January 24. 1919) 



General. — (a) This specification covers the requirements for 

 tubing for general use. 



(b) See War Department Specification No. 333-1-1, headed 

 General Specification for Mechanical Rubber Goods', which is 

 made a part hereof, except in such cases as the provisions below 

 directly conflict. In such cases the word and meaning of this 

 specification w-ill govern. 



Construction. — See General Specifications. 



(a) Dimensions shall be as follows: 



I. D. Wall Thickness 



!4-inch I/16inch 



H-inch S/64-inch 



'/i-inch 3/32inch 



)ii-inch 1/ 8.inch 



1-inch 1/ 8'inch 



IJl-inches 3/16-inch 



Branding. — Not required. 

 Material. — See General Specifications, 

 (o) Tubing shall be white. 

 Inspection. — See General Specifications. 



(o) Inspector may cut at random a 3-foot section from each 

 lot of 1,000 feet or less. 

 Tests. — See General Specifications and following table. 



(a) Test specimens to be % by 1 inch at the constricted part. 



Table 



Tensile, minimum pounds 900 



Ultimate elongation, minimum inches 1-5 



Set: 



Stretch for 10 minutes inches 1-4 



Per cent set after 10-minute rest maximum 25 



RUBBER TIPS FOR FLEXIBLE METALLIC HOSE 



War Department Specitication. No. 335-1-1 — June 5, 1919 

 (Authority of Supply Circular No. 8. P. S. & T. Div., January 24. 1919) 

 General. — (o) This specification covers the requirements for 

 molded tips to be used with metallic hose in airplanes, etc. 



(b) See War Department Specification No. 333-1-1, headed 

 General Specification for Mechanical Rubber Goods', which is 

 made a part hereof, except in such cases as the provisions below 

 directly conflict. In such cases the word and meaning of this 

 specification will govern. 



Construction. — See General Specifications. 



(a) Size and shape, together with metal tips, as specified in 

 proposal. 



Branding. — See General Specifications. 



Material. — See General Specifications. 



Inspection. — See General Specifications. 



(a) Manufacturer shall furnish inspector with eight strips 

 for test purposes, as specified in the General Specifications, for 

 each shipment. 



Tests. — See General Specifications and following table. 



Table 



Tensile, minimum pt^ntds 800 



Ultimate elongation; 



Ma.\imum inches 2-9 



Minimum inches 2-5 



BUMPERS 



War Department Specification, No. 335-1-3 — June 5, 1919 



(.^niioRiTV OF Supply Circular No. 8. P. S. St T. Div., January 24. 1919) 



General. — (a) This specification covers the requirements for 

 automobile bumpers. 



{b) See General Specifications for Mechanical Rubber Goods' 

 which are a part hereof. 



Construction. — See General Specifications. 



(a) Size and shape as specified in proposal. 



Branding. — See General Specifications. 



(a) Shall l>e molded with the words "U. S. :\. Bumper," 

 manufacturer's name, and date. Any other branding shall be 

 specified in proposal. 



Materials. — See General Specifications. 



Inspection. — See General Specifications. 



(a) Inspector shall select 3 pieces at random from each and 

 every shipment of 1,000 pieces or less. 



Tests. — See General Specifications and following table. 



(o) Test pieces shall be cut from bumpers and buflFed to a 

 thickness of approximately ^-inch. 



Table 



Tensile, minimum pounds 8O0 



Klongation, minimum inches 2—5 



Ultimate, maximum inches 2—5 



