1、MIL-E-176246 34 7797706 0245147 T W rd-wa5 p-il-03 MIL-E-l7624B(SH) 11 August 1987 SUPERSEDING MIL-E-l7624A(SHIPS) 15 June 1960 (See 6.5) MILITARY SPECIFICATION EXPANDER, TUBE, ROLLER, BOILER TUBE This specification is approved for use within the Naval Sea Systems Command, Department of the Navy, an
2、d is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers boiler tube expanders of the self- feeding parallel rolling type for use in expanding carbon steel and alloy steel tubes in all types of boilers. 1.2 Classification. Tub
3、e expanders shall be of the following types and classes, as specified (see 6.2): Type I - Plain expander Class 1 - General application Class 2 - Economizer Class 3 - Superheater Class 4 - Air heater Type II - Long reach expander Type III - Reverse expander 2. APPLICABLE DOCUMENTS 2.1 Government docu
4、ments. 2.1.1 Specifications and standards. The following specifications and stan- dards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications
5、and Standards (DODISSI and supplement thereto, cited in the solicitation. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy,
6、Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 3441 DISTRIBUTION STATEMENT A Approved for public release; distribution -. unlimited THIS DOCUMENT CONTAINS q PAGES. Lic
7、ensed by Information Handling Services.- MIL-E-l7624B(SH) SPECIF KATIONS FEDERAL PPP-P-40 - Preservation and Packing of Hand Tools; Tools and Tool Accessories for Power Driven, Metai and Woodworking Machinery. MILITARY MIL-P-116 - Preservation, Methods of. STANDARD MILITARY MIL-STD-105 - Sampling Pr
8、ocedures and Tables for Inspection by Attributes. 2.1.2 Government drawings. The following Government drawing forms a part of this specification to the extent specified herein. the issues shall be those in effect on the date of the solicitation. Unless otherwise specified, DRAWING NAVAL SEA SYSTEMS
9、COMMAND (NAVSEA) 5000-S5101-1385500 - Expanders, Tube, Boiler, Assemblies and Details, Dimensions for. (Copies of specifications, standards, and drawings required by contractors in connection with specific acquisition functions should be obtained from the Contracting activity or as directed by the c
10、ontracting activity.) 2.3 Order of precedence. this specification and the references cited herein (except for associated detail In the event of a conflict between the text of specifications, specification sheets or MS standards), the text of this speci- fication shall take precedence. Nothing in thi
11、s specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.3 and 6.3). 3.2 Materials. 3.2.
12、1 Cages. Cages shall be made of heat-treated alloy steel, hardness 46-50 Rockwell C. 3.2.2 Mandrels and rolls. Mandrels and rolls shall be made of alloy tool steel, tempered and hardened to withstand the shocks and wear of regular usage, hardness 60-64 Rockwell C. Shanks on mandrels for expanders 2
13、inches and larger shall have hardness 46-48 Rockwell C. Mandrels and rolls shall be free from all bends. No decarbonization will be permitted on the rolls and mandrels. 2 Licensed by Information Handling ServicesMIL-E-37b24B 34 m 977970b 0245347 3 m - 3.2.3 Recovered materials. Unless otherwise spec
14、ified herein, all material and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. “recovered materials“ means materials which
15、 have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless other- wise specifically spec
16、ified. The term 3.3 Construction. Expanders shall consist of mandrels, cage, and three rows of rolls. Unless otherwise specified in the contract or order (see 6.2), expanders shall be right-hand feed. Expanders shall be configured so that the minimum diameter to which the tool expands will be reache
17、d before rolls bind. 3.3.1 Expanders, rolls and mandrels shall be furnished in the sizes shown on Drawing 5000-S5101-1385500. Unless otherwise specified (see 6.2), complete expanders shall be furnished with rolls and set of drum mandrels as specified on Drawing 5000-S5101-1385500. Each expander shal
18、l be supplied with an extra set of rolls in order to permit substitution of a long roll for the short and flare roll when rerolling tubes. 3.3.2 Cage. Cages shall be configured so that rolls cannot fall in or out when mandrel is withdrawn. follows : Tolerance on the diameter of the cages shall be as
19、 (a) (b) For cages for 1 to 1-1/2 inch expanders inclusive - plus or For cages for 2 inch expanders and larger - plus or minus minus 0.003 inch. 0.005 inch. Cages shall conform to the dimensions shown on Drawing 5000-S5101-1385500 as required for each type and class of expander. 3.3.2.1 Cage slots.
20、Slots shall be 120 degrees apart and configured to give a feed angle of 2 degrees minus 1/4 degree plus O degree for 1 to 1-1/2 inch expanders, inclusive, and 1-3/4 degrees minus 1/4 degree plus O degree for 2 inch expanders and larger. be plus or minus 0.005 inch with a nominal clearance of 1/64 in
21、ch over roll length. Tolerance on width of roll slots shall be as follows: Tolerance on the length of roll slots shall (a) For 1 to 1-1/2 inch expanders inclusive - nominal clearance of 0.004 inch over major diameter of roll with a tolerance of plus 0.005 inch, minus 0.002 inch. For 2 inch expanders
22、 and larger - nominal clearance of 0.008 inch with a tolerance of plus 0.006 inch, minus 0.004 inch. (b) Slots shall be so configured that front end of all rolls are in the same plane. 3 Licensed by Information Handling ServicesMIL-E-17b24B 34 W 777770b 0245150 T W MIL-E-1 7 624B ( SH) 3.3.3 - Rolls
23、. Rolls shall have a taper of 1/64 inch per inch total taper over effective length of roll to produce parallel expansion of the tube. Effective length of roll shall be 3/8 inch beyond tube seat specified (see 6.2). Rolls shall be ground or polished with tool marks removed. They shall be rounded at t
24、he entrance end a sufficient amount to prevent flat end of roll from jamming into unrolled portion of the tube when expander is being used at the maximum expansion. be removed and replaced by a long roll of the same set when rerolling of tubes is required without flaring. This does not apply to long
25、 reach expanders. Rolls shall be configured so that the short roll and flare roll may 3.3.3.1 Tolerances on the diameter of rolls shall be as follows: (a) (b) For 1 to 1-1/2 inch expanders inclusive - plus 0.000, For 2 inch expanders and larger - plus 0.000 minus 0.005 minus 0.003 inch. inch. 3.3.3.
26、2 Tolerances on the length of rolls shall be as follows: (a) For all sizes of expanders -+lus 0.000, minus 0.005 inch. 3.3.4 Mandrels. Mandrels shall have a taper of 1/32 inch per inch of mandrel length. Mandrels shall be supplied in four lengths, and shall be conconstructed for hand or power operat
27、ion. Mandrels for the 1 inch up to, but not including, the 3-inch expanders shall have a 1/2 inch square shank. Mandrels for expanders for tubes 3 inches and larger shall have a 1 inch square shank. Tapered section of mandrels shall be ground or polished with toolmarks removed. Tolerances on diamete
28、rs shall be plus or minus 0.004 inch. The square shank of each mandrel for expanders 2 inches and larger shall be drawn back to a Rockwell C hardness of 46-48. Mandrels may be supplied with a 1/2 inch straight section adjacent to the shank, if the manufacturer so desires. In the event mandrels are s
29、o supplied, major diameter of mandrel as specified on Drawing 5000-S5101-1385500 shall be decreased by 0.016 inch. 3.3.5 Interchangeability. In no case shall parts be physically interchange- able or reversible unless such parts are also interchangeable or reversible with regard to function, performa
30、nce and strength. 3.4 Type I, plain expanders. Plain expanders shall consist of mandrels, cage, two tapered long rolls, one tapered short roll, and one flare roll. 3.4.1 Class 1, general application and class 4 airheater. Cages for expanders for tube sizes up to, but not including 3 inches shall be
31、configured to enter a handhole 3-3/8 by 3-3/4 inches. Cages for expanders for tube sizes 3 inches and larger shall be configured to enter a handhole 3-25/32 by 4-23/32 inches. 3.4.2 Class 2, economizer and class 3, superheater. Cages shall be configured to enter a handhole 2 inches in diameter. 4 Li
32、censed by Information Handling ServicesNIL-E-17b24B 34 W 9999906 0245151 L - 3.5 Type II, long reach expander. Long reach expanders shall consist of Cages shall be constructed to expand tube seats mandrels, cage, three tapered long rolls, and a steel thrust collar attached to the case to prevent its
33、 loss. 2-1/2 inches and larger in 2 operations. Long reach expanders shall expand the outer (fireside) end of seat. The inner (water side) end of tube shall be expanded with the appropriate type I, class 1 expander for 1-3/4 inches seat for the tube size required. 3.6 Type III, reverse expander. Rev
34、erse expanders shall consist of mandrels, cage, thrust collar, 2 tapered long rolls, one tapered short roll, and one flare roll. Flare roll shall be in opposite end of cage as compared to type I expanders. end of nipples 2-1/2 to 5 inches long. conjunction with appropriate plain expander for tube si
35、ze and seat required in nipples where further seat is inaccessible. Expander shall be adjustable to expand inaccessible Reverse expanders shall be used in 3.7 Marking. 3.7.1 Expanders. name and NAVSEA “E number, as it appears on Drawing 5000-S5101-1385500, size of tube and tube wall thickness for wh
36、ich used, and tube seat length for which used. Each expander cage shall be marked with the manufacturers 3.7.2 Rolls. The designation as shown on Drawing 5000-S5101-1385500 shall be stamped on a linen tag and attached to the container in which rolls are supplied. The nominal tube seat length for whi
37、ch used, manufacturers name, contract number, and item number shall also be included. Each set shall be individually wrapped and a linen tag bearing the same information as that on the container wrapped with set. expander. Rolls will be purchased in sets for a complete 3.7.3 Mandrel designation as s
38、hown on Drawing 5000-S5101-1385500 shall be In addition, manufacturers name or mark stamped on the shank of each mandrel. shall be stamped on the shank. 3.7.4 In addition to 3.7.1, 3.7.2 and 3.7.3, each complete expander shall have a linen tag attached to it containing the following information: (1)
39、 Manufacturers name (2) (3) Standard Navy stock number Contract number and item number 3.8 Workmanship. The workmanship shall be first class in every respect. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contract
40、or is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disap
41、proved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 5 Licensed by Information Handling Services_ VIL-E-17624B 34 m
42、777770b 0245352 3 m 4.1.1 Responsibility for compliance. All items must meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the spe
43、cification shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. known defective material, either indicated or actual, nor does it commit the Government to acceptance o
44、f defective material. Sampling in quality conformance does not authorize submission o 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) (b) First article inspection (see 4.3). Quality conformance inspection (see 4.4). 4.3 First article ins
45、pection. Prior to production, expander shall be examined and tested as specified in 4.6. During testing under 4.7.2, the tools shall be operated by the usual qualified personnel during normal maintenance tube expanding operations on boilers. operation, first article inspection shall be repeated. Aft
46、er initial approval for satisfactory 4.3.1 Samples for first article inspection. The contractor shall submit four complete units with drum mandrels for 1-3/4 inch tube sheet thickness covering each type expander for which he desires approval. 4.4 Quality conformance inspection. Quality conformance i
47、nspection shall consist of the examination specified in 4.6 and test specified in 4.7.1, 4.5 Sampling for quality conformance inspection. 4.5.1 Inspection lot. All assembled expanders, rolls, or mandrels of the same size offered for delivery at one time shall be considered an inspection lot. 4.5.2 S
48、ampling for visual and dimensional examination. Sample rolls, mandrels, and assembled expanders shall be selected from each lot, at random, in accordance with MIL-STD-105 at inspection level II for the examination of 4.6. The acceptable quality level (AQL) shall be 1.5 percent defective. 4.5.3 Sampl
49、ing for hardness test. Sample rolls, mandrels, and assembled expanders shall be selected in accordance with MIL-STD-105 at inspection level I for the test specified in 4.7.1. 4.6 Visual and dimensional examination. Each of the assembled expanders selected in accordance with 4.5.2 shall be examined to determine conformance to this specification regarding dimensions, fits, finishes, security of assembly and freedom of movement of the parts. Each of the sample rolls and mandrels selected in accordance with 4.5.2 shall be examined to determine conformance to this speci- fi
