DLA A-A-59228-1998 TONGS MATERIAL LIFTING PIPE《材料起重用管钳》.pdf
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1、A-A-59228 9038054 0000334 7T3 m INCH-POUND A-A-5 9228 Mav 18.1998 SUPERSEDING June 5,1991 GGG-T-276 1 COMMERCIAL ITEM DESCRIPTION TONGS, MATERIAL LIFTING, PIPE The General Services Administration has authorized the use of this commercial item description for all Federal agencies. 1. SCOPE. This comm
2、ercial item description (CID) covers two classes of metal tongs for lifting material such as cylindrical configured pipe, conduit, and other items with a cylindrical configuration. 2. CLASSIFICATION. The tongs covered by this CID shall be of the following classes and sizes as specified (see 7.2): CL
3、ASSES Class I - Cast aluminum. Class II - Steel. SIZES Size -4 - For use with 4.5-inch ( 144.30 millimetre (rnm) outside diameter pipe. Size 6 - For use with 6.62-inch (168.14 mm) outside diameter pipe. Size 8 - For use with 8.62-inch (218.94 mm) outside diameter pipe. Size 10 - For use with 10.75-i
4、nch (273.05 mm) outside diameter pipe. Size 12 - For use with 12.75-inch (323.85 mm) outside diameter pipe. Beneficial comments, recommendations, additions, deletions, clarifications, etc., and any data which may improve this document should be sent to: Commanding Officer (Code 15E2), Naval Construc
5、tion Battalion Center, 1000 23d Avenue, Port Hueneme, CA 93043-4301, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 3940 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
6、om IHS-,-,- A-A-59228 W 9038054 0000335 b3T A-A-5 9228 3. SALIENT CHARACTERISTICS. 3.1 Standard commercial product. The tongs shall, as a minimum be in accordance with this commercial item description and shall be the manufacturers standard commercial product. Additional or better feaaires which are
7、 not specifically prohibited by the commercial item description but which are a part of the manufacturers standard commercial product, shall be included in the tongs being furnished. A standard commercial product is a product which has been sold or is being currently offered for sale on the commerci
8、al market through advertisements or manufacturers catalogs, or brochures, and represents the latest production model. 3.2 Desim and constniction. Tongs shall be of the lever, double jaw, open caliper type with compound leverage grip. The jaws or liners shall grip the outside of the pipe at a point b
9、elow the centerline of the pipe. The tongs shall be constructed to provide a nonmanual positive release from the pipe after the pipe is set down, and the hoisting line is slacked off. Tongs shall be of a configuration suitable for operation in a close side clearance for handling in a narrow trench.
10、When specified (see 7.2), liners for tongs shall be provided for handling pipe of outside diameter as specified (see 7.2). The tongs shall comply with the requirements of ANSUASME B30.20. 3.2.1 Class I. Class I tongs shall be of heat-treated aluminum alloy as specified 3.6.2; and shackles, links, an
11、d rings shall be aluminum-alloy forging as specified in 3.6.3; or shackles shall be of cast-aluminum alloy as specified in 3.6.2. 3.2.2 Class II. Class It tongs shall be fabricated of steel plate a specified in 3.6.4, or cast steel as specified in 3.6.5; shackles, links, and rings shall be steel for
12、gings as specified in 3.6.6; or shackles shall be steel castings as specified in 3.6.5. Fulcrum pins shall be brass as specified in 3.6.7. 3.3 Performance. The tongs shall be capable of lifting and holding a gross load of weighted pipe of not less than the following: Size 4 - 1,250 pounds (lb) (566
13、kilogram (kg). Size 6 - 1,800 lb ( 815 kg). Size 8 - 3,000 lb (1 359 kg). Size 10 - 4,000 lb (1 812 kg). Size 12 - 4,500 lb (2 039 kg). The weighted pipe shall remain secure aRer being swung in an arc. The tongs shall be capable of releasing the weighted pipe after being sat down by slacking off the
14、 lifting line without manual manipulation of the tongs. 3.4 Finish. Surfaces normally painted in good commercial practice shall be cleaned, treated, and painted. Unless otherwise specified (see 7.2), the color of the finish coat shall be the manufacturers standard. 3.5 Markina for identification. To
15、ngs shall be marked with the manufactrers name or readily identifiable trademark. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-59228 9018054 0000336 576 A-A-59228 3.6 Workmanship. The quality of workmanship shall meet the standards prevalen
16、t among manufacturers who normally produce equipment of the type specified herein. 3.6.1 Forgings. Forgings shall be free from scale, enclosures, cold shuts, mismatching, and other similar defects that may affect the structural strength of the forgings involved. 3.6.2 Cast aluminum. Cast aluminum pa
17、rts shall be aluminum-alloy castings, heat-treated, conforming to ASTM B 179. The alloy designation shall be that used by the manufacturer in regular commercial production of the parts. 3.6.3 Aluminum forging. Aluminum forging parts shall be aluminum-alloy casting, heat treated, conforming to ASTM B
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- DLAAA592281998TONGSMATERIALLIFTINGPIPE 材料 重用 PDF

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