1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 1 of 35 NAVISTAR, INC. Material, Parts, and Process Specifications
2、(MPAPS) NUMBER: MPAPS S-L-7.101-GS/PL Former Designation: ESP-L-7.101-GS TITLE: Hydrualic Tube Fitting - 37 Flared Tube Components and Flareless Tube Components - English Series (Noun Code - 3300) CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials E
3、ngineering SUPERSEDES ESP-J-7.101-GS - August 2006 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The
4、 user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior to use. Change Notice: Changed to New MPAPS format; Combined GS, PP, NPP. 1.0 GENERAL: This standard conforms in all essentials with the SAE Standard J514 for Hydraul
5、ic Tube Fittings and the straight “O“ Ring bosses and related components with which they are assembled. These fittings are intended for general application in hydraulic systems on industrial equipment and commercial products. 2.0 CONTENTS: Page General 1 Size Designations 1 Dimensions and Tolerances
6、 2 Passage 2 Wall Thickness 2 Contours 2 Straight Threads 2 Pipe Threads 3 Material 3 Finishes 4 Restricted Chemical Substances 4 Defects 4 Policy for Selecting Parts for New Design 4 Assembly Considerations 4 Assembly Instructions 6 Dimensions and Part List 10 Technical Information 35 3.0 SIZE DESI
7、GNATIONS: Fitting sizes are designated by the corresponding outside diameter of the tubing for the types of tube ends and by the corresponding standard nominal pipe size for pipe thread ends. NUMBER: MPAPS S-L-7.101-GS/PL TITLE: Hydraulic Tube Fittings - 37 Flared Tube Components and Flareless Tube
8、Components REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 35 4.0 DIMENSIONS AND TOLERANCES: Di
9、mensions of single and double 37 flares on tubing for use in conjunction with the 37 flared type fittings and dimensions for straight thread “O“ Ring bosses into which connector and adjustable styles of hydraulic tube fittings assemble are given in EM-16. The specification for “O“ Ring seals used in
10、 such assemblies are given in MPAPS S-S-1.101-GS/PL. The tabulated dimensions will apply to the finished fittings, plated or otherwise processed, as specified by the purchaser. The maximum and minimum across flat dimensions will be within the commercial tolerance of bar or extruded stock from which
11、the fittings are produced. The minimum across comers dimensions of hexagons will be 1.092 times the nominal width across flats, but will not result in a side flat width less than .43 times the nominal width across flats. Tolerances on all dimensions not otherwise limited will be plus or minus .016 i
12、nch. Fitting seats must be concentric with straight thread pitch diameters within .010 inch full indicator movement (FIM). Where so illustrated and not otherwise specified, hexagon corners will be chamfered 15-20 degrees to a diameter equal to the nominal width across flats, with a minus tolerance o
13、f .016 inch; or where design permits, corners may be chamfered to the diameter of the abutting surface providing the length of chamfer does not exceed that produced by the 20 degrees chamfer previously described. Unless otherwise specified, tolerance on hole diameters designated “Drill“ in the dimen
14、sional tables will be as tabulated below: Drill Size Range Tolerance in Plus Minus In .0135 - .246 .003 .003 .250 - .500 .004 .004 .516 - .750 .005 .005 .765 - 1.000 .007 .005 1.016 - 1.500 .008 .005 1.516 and over .010 .005 5.0 PASSAGES: Where passages in straight fittings are machined from opposit
15、e ends, the offset at the meeting point will not exceed .015 inch. The cross-sectional area at the junction of passages in angle fittings will not be less than that of the smallest passage. 6.0 WALL THICKNESS: Unless otherwise designated, the wall thickness at any point on fittings will not be less
16、than the thickness established by the specified dimensions, tolerances, and eccentricities for inner and outer surfaces. 7.0 CONTOURS: Details of contour will be optional with manufacturer provided the tabulated dimensions are maintained and serviceability of the fittings is not impaired. 8.0 STRAIG
17、HT THREADS: Unified Standard, Class 2A, external threads and Class 2B, internal threads with modified minor diameters where specified, will apply to plain finish (unplated) fittings of all types. For externally threaded parts with additive finish, the maximum diameters of Class 2A may be exceeded by
18、 the amount of the allowances; that is, the basic diameters (Class 2A maximum diameters plus the allowance) will apply after plating. For internally threaded parts with additive finish, the Class 2B diameters and modified minor diameters apply after plating. The pitch diameter tolerance will be the
19、same as the corresponding diameter-pitch combination and class of the Unified fine and 12 thread series. See SAE J475. NUMBER: MPAPS S-L-7.101-GS/PL TITLE: Hydraulic Tube Fittings - 37 Flared Tube Components and Flareless Tube Components REVISION: 1506 This document is restricted and may not be sent
20、 outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 3 of 35 Where external threads are produced by roll threading and body is not undercut, the unthreaded portion of
21、body adjacent to the shoulder may be reduced to the minimum pitch diameter. External threads will be chamfered and internal threads will be countersunk as specified in the dimensional tables. 9.0 PIPE THREADS: External pipe threads will be chamfered from the diameters tabulated below to produce the
22、specified length of chamfer of partial thread. Internal pipe threads will be countersunk 90 degrees, included angle to the diameters tabulated in Table 1: DIMENSIONS OF PIPE THREAD CHAMFERS AND COUNTERSINKS Table 1 Tabulated diameters conform with SAE Dryseal Pipe Thread Standard. Sealant Coating: A
23、ll fittings that have external pipe threads will be furnished with a pre-applied sealant coating on the pipe threads that meets the requirements CEMS D-31. 10.0 MATERIAL: This standard covers hydraulic tube fittings made from carbon steel, stainless steel, and brass. Regardless of which material is
24、specified, manufacturing considerations and performance criteria require that the base material, and filler material, where fittings are fabricated from several individual pieces, must withstand a working pressure of 3000 psi, a proof pressure of 6000 psi (for leaks and distortion), and must not mel
25、t below 1900C (typical minimum copper brazing temperature). Unless otherwise specified, carbon steel fittings and ferrules will be made from steel, Code 0-115, MPAPS A-0, Part II. Flareless type ferrules will be made from SAE 1010, 1112, 1113, or 12L14 steel, case hardened Class 3 or 3A, MPAPS A-40,
26、 Section A. Carbon steel fittings fabricated from multiple pieces are permissible. These fabricated assemblies are subject to the same manufacturing considerations and performance criteria cited above. Therefore, if fabrication involves welding, vendors must recognize that the free machining steels
27、of Code 0-115 possess inherent welding limitations that may preclude the manufacture of acceptable welded fittings on a consistent basis. Consequently, for welded fittings, the use of steels meeting the minimum expected yield strength of Code 0-115, but with 0.23% carbon maximum, 1.00% Dimensions in
28、 Inches: Nominal Pipe Thread Size External Thread Internal Thread Countersink Diameter Chamfer Diameter Chamfer Length Max Min Min Max Min Max 1/8 .32 .30 .037 .055 .42 .44 1/4 .42 .40 .056 .084 .55 .57 3/8 .55 .53 .056 .084 .69 .71 1/2 .68 .66 .071 .107 .85 .87 3/4 .89 .87 .071 .107 1.05 1.07 1 1.1
29、2 1.09 .087 .130 1.34 1.37 1-1/4 1.46 1.43 .087 .130 1.68 1.71 1-1/2 1.70 1.67 .087 .130 1.92 1.95 2 2.17 2.14 .087 .130 2.39 2.42 NUMBER: MPAPS S-L-7.101-GS/PL TITLE: Hydraulic Tube Fittings - 37 Flared Tube Components and Flareless Tube Components REVISION: 1506 This document is restricted and may
30、 not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 4 of 35 manganese maximum, 0.05% sulfur maximum, and 0.06% phosphorus maximum, is preferred and recomm
31、ended. Vendors of welded fittings may use any alternate steel meeting these additional composition restrictions without prior approval from Navistar Engineering or Manufacturing. Unless otherwise specified, stainless steel fittings and ferrules will be made from the AISI austenitic Series 300 stainl
32、ess steel, MPAPS A-37. Ferrules will exhibit a hardness which enables them to be satisfactorily clinched to fully annealed Type 304 stainless steel tubing. The stainless steel will not be *passivated unless so specified by Navistar Truck and Engine Corporation. Unless otherwise specified, wrought co
33、pper base alloy (brass) fittings and ferrules will be made from bar stock, C36000, 1/2 hard temper, or from forgings, C37700, per CEMS C-3. 11.0 FINISHES: As designated by part number, fittings will be furnished plain, plated, or coated in accordance with the Navistar Engineering Material Specificat
34、ion and class below: Plain finish will be furnished with a light oil film. Zinc Trivalent (ZN6A) on Steel MPAPS G-20, Class 6A Zinc (ZN) on Brass MPAPS G-20, Class 1 Phosphate (PHC) Coating on Steel MPAPS G-1, Class B-2 12.0 RESTRICTED CHEMICAL SUBSTANCES: Effective January 1, 2007, all product supp
35、lied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. 13.0 DEFECTS: Fittings will conform to best commercial quality consistent with good workmanship. They will be free from hanging burrs, slivers, seams, loose scale and all other defects t
36、hat might affect their serviceability. All sealing surfaces must be smooth except that annular tool marks up to 100 micro inches max will be permissible. 14.0 POLICY FOR SELECTING PARTS FOR NEW DESIGN: For new design, parts shall be selected from “Approved“ part list only. 37Flare - Steel, Zinc Flar
37、eless - Steel, Phosphate Coating 15.0 ASSEMBLY CONSIDERATIONS: Use of a compatible lubricant is desirable in assembly of Dryseal pipe threads on hydraulic tube fittings to minimize galling and effect a pressure tight seal. For design reference purposes, the dimension of assembled two-piece and three
38、-piece 37 degree flared tube fitting connections are depicted in Figures 1 and 2, respectively, and specified in Table 2. NUMBER: MPAPS S-L-7.101-GS/PL TITLE: Hydraulic Tube Fittings - 37 Flared Tube Components and Flareless Tube Components REVISION: 1506 This document is restricted and may not be s
39、ent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 5 of 35 For design reference purposes, the dimensions of assembled flareless tube fitting connections with Styl
40、e A and Style B ferrules are depicted in Figures 3 and 4, respectively, and specified in Table 3. Dimensions in Inches: Table 2 Nominal Tube OD F Ref G Ref H Ref 1/8 .19 .12 .48 3/16 .25 .12 .56 1/4 .19 .17 .59 5/16 .30 .11 .66 3/8 .28 .19 .69 1/2 .31 .19 .81 5/8 .38 .27 .94 3/4 .36 .25 1.03 7/8 .38
41、 .31 1.19 1 .34 .41 1.31 1-1/4 .34 .39 1.50 1-1/2 .50 .55 1.53 2 .55 .53 1.75 NUMBER: MPAPS S-L-7.101-GS/PL TITLE: Hydraulic Tube Fittings - 37 Flared Tube Components and Flareless Tube Components REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced wit
42、hout permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 6 of 35 16.0 ASSEMBLY INSTRUCTIONS: To assure proper installation and performance of fittings, the following instructions are provided herein for the guida
43、nce of the user: 1. Assembly of Flareless Hydraulic Tube Fittings: The following instructions will apply to the assembly of hydraulic tube fitting of the flareless type shown in section 17.0. Inasmuch as proper makeup of these connections depends largely upon the securing of the ferrule on the tube
44、by the cutting action of the sharp edge on the ferrule biting into the tube wall, it is recommended these procedures be adhered to in the assembly operation: 1.1 Tube end will be cut square and the inside and outside edges deburred (not excessively). 1.2 The ferrule and threads on fitting body and n
45、ut will be lubricated with oil or petrolatum. Nut will be assembled over tube with open end out and the ferrule will be slid over tube with cutting edge out and the large head end inside the nut. Tube end will then be inserted into fitting. 1.3 Tube will be bottomed in seat of fitting and the nut ti
46、ghtened until the ferrule just grips the tube. A little experience will enable the user to determine this point by feel. Where the fittings are bench assembled, the gripping action may be determined by hand rotating the tube as the nut is drawn down. When the tube can no longer be turned by hand. th
47、e ferrule has started to grip the tube. 1.4 After the ferrule has gripped the tube, the nut will be tightened one full turn. (This may vary slightly with different tubing materials, but provides a rule of thumb for general practice.) 1.5 The connection will then be disassembled and the seating of fe
48、rrules inspected. Though the two styles of ferrules have similar principles of make-up and application, the inspection characteristics of their seating on the tube are somewhat different. For the Style A ferrule. the bite or cut into the tube wall can be readily seen since it occurs at the lead edge
49、 of the ferrule. The bite into the tube will show a definite groove where the ferrule has cut into the tube and peeled the metal over the lead edge of the ferrule. See Figure 5. Dimensions in Inches: Table 3 Nominal Tube OD A Ref B Ref C Ref 1/8 .188 .31 .08 3/16 .188 .34 .12 1/4 .234 .42 .14 5/16 .250 .42 . 14 3/8 .250 .47 .14 1/2 .305 .50 .14 5/8 .350 .53 .14 3/4 .350 .56 7/8 .350 .53 .17 1 .415 .66 .20 1-1/4 .415 .72 .20 1-1/2 .485 .72 .20 2 .485 .84 NUMBER: MPAPS S-L-7.101-GS/PL TITLE: Hydraulic Tube Fitt
