1、26 September 1961 SUPERSEDING MIL-F-O020670A(SHIPS) 28 October 1958 19 September 1952 MIL-F-20670 MILITARY SPECIFICATION FLANGES, PIPE, CARBON STEEL, 150 P. S. I. , W. S. P. (FOR NAVAL SHIPBOARD USE) 1. SCOPE 1.1 Scope. - This specification covers carbon steel pipe flanges, 150 pounds per square inc
2、h (p.s.i.), W.S.P. 1.2 Classification. - Flanges shall be of the following types, as specified (see 6.2): Type A - Plain (slip-on). Type B - Welding neck. Type C - Flat-faced (slip-on). Type D - Flat faced welding neck. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on d
3、ate of invitation for bids, -form a part of this specification to the extent specified herein: SPECIFICATIONS MILITARY MIL-V-3 - Valves, Fittings and Flanges (Except for Systems Indicated herein); Packaging of. STANDARDS FEDERAL FED-STD-151 - Metals; Test Methods. MILITARY MIL-STD-105 - Sampling Pro
4、cedures and Tables for Inspection by Attributes. (Copies of specifications, standards, drawings and publications required by contractors in connec- tion with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publicatio
5、ns. - The following document forms a part of this specification to the extent speci- fied herein. Unless otheryise indicated, the issue in effect on date of invitation for bids shall apply. OFFICIAL CLASSIFICATION COMMITTEE Uniform Freight Classification Rules. (Application for copies should be addr
6、essed to the Official Classification Committee, 1 Park Avenue at 33rd Street, New York 16, New York). 3. REQULREMENTS 3.1 Material. - Flanges shall be forged or machined from steel, manufactured by the open hearth, crucible, or electric furnace process. 3.2 Chemical composition and physical prop- er
7、ties. - Flanges shall be normalized and, after normalizing, shall conform to the chemical com- position and-physical properties shown in tables I and It. 3.2.1 The necessary machining operations shall 3.3 Dimensions and tolerances. - 3.3.1 Dimensions.- Thedimensions of the flanges i be performed aft
8、er normalizing. shall be shown in table m, a8 specified (see 6.2). Table I - Chemical composition. I Carbon O. 05 O. 05 o. 91 o. 35 Percent Percent Percent Percent Percent Percent Percent Percent Percent (maximum) (maximum) (maximum) (maximum) (maximum) (maximum) (maximum) (maximum) (maximum) Molybd
9、enum Chrome Nickel Copper Silicon Phosphorus1 Sulfur Mangahese o. 20 O. 25 O. 50 O. 25 O. 30 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. Table II - Physical Properties. 3.3.1.1 Tolerances. - The tolerance for the flanges shall be as shown in
10、table IV. I Tensile of area in 2 inches point strength Reduction Elongation Yield minimum) 3.3.1.2 The maximum and minimum measure- (minimum) (minimum) (minimum) 3-1/2 inches and over. 35 25. O 30,000 60,000 inches and under, nor more than 1/8 inch for sizes shall not differ by more than 1/16 inch f
11、or sizes 3 percent Percent P. s. i. P. 8. i. ments from edge of bore to circumference of flanges Table III - Flange dimensions, Nominal size Inches 1/4 3/8 1/2 3/4 1-1/4 142 2-1/2 1 2 3 3-112 4 4- 1/2 5 5-1/2 6 7 8 9 10 11 12 14 O. D. 15 O. D. 16 O. D. 18 O. D. 20 O. D. Actual external diameter of t
12、ubing Inches O. 540 .675 .840 I. 050 1.315 1.660 1.900 2.375 2.875 3.500 4.000 4.500 5.000 5.563 6.125 6.625 7.625 8.625 9.625 10.750 11.750 12.750 14.000 15.000 16.000 18.000 20.000 All types (eeefig.1 through 4) A Inches 7/16 7/16 7/16 1/2 1/2 1/2 5/8 5/8 5/8 3/4 3/4 7/8 7/8 7/8 17/32 9/16 11/16 1
13、1/16 13/16 13/16 15/16 1 15/16 1 1- 1/16 1- 1/8 1- 1/4 D Inches 3- 1/4 3- 3/8 3- 9/16 3-13/16 4- 1/4 4- 1/2 5- 1/16 5- 9/16 6- 1/8 6- 5/8 7- 3/16 7-11/16 8- 3/16 9- 1/16 9- 9/16 10- 1/8 11- 5/16 12- 3/8 13-15/16 16- 9/16 17- 5/8 19- 1/8 20- 1/8 21- 3/16 23- 1/4 25-13/16 15 Types A and B (see fig. 1
14、and 2) E Inches 1- 1/8 1- 1/4 1- 3/8 1-11/16 2 2- 7/8 4 5- 3/8 5- 7/8 6- 3/8 7 7- 5/8 8- 1/8 9- 1/4 10- 1/4 11- 3/8 13- 5/8 14- 3/4 2- 1/2 3- 1/2 4- 3/4 12- 1/2 16 17 18- 1/4 20- 3/8 22- 1/2 - Types A and C (see fig. 1 and 3) G Inches O. 568 ,703 . S68 1.078 l. 343 1.688 l. 928 2.422 2.922 3.547 4.0
15、47 4.547 5.047 5.648 6.2 10 6.710 7.710 8.710 9.710 10.874 11.874 12.874 14.124 15.124 16.124 18.124 20.124 T F “ Inches -“ O. 60 .81 1.07 1.42 1.66 2.13 2.63 3.26 3.76 4.26 4. 67 5.23 5.88 6.19 7.55 8.15 9.15 10.23 “- -“ “- -“ “- “- “- -“ Types B and D (see fig. 2 and 4) H Inches “ “ O. 84 1.05 1.3
16、2 1. 66 1.90 2.38 2.88 3.50 4.00 4.50 5.00 5.56 6.13 6.63 7.63 8.63 9.63 10.75 “ “ “ “ “ “ “ X Inches “ “ 1- 3/16 1-15/16 2- 5/16 2- 9/16 3- 1/16 4- 1/4 4- 13/16 5- 5/16 5- 7/8 6- 7/16 7 7- 9/16 8- 5/8 9-11/16 10-13/16 12 1- 1/2 3- 9/16 “ “ “ “ “ “ “ Y Inches “ “ 1- 7/8 2- 1/8 2- 1/8 2- 9/32 2- 5/16
17、 2- 7/16 2- 1/16 2- 1/2 2- 1/2 2- 3/4 3- 1/16 3- 5/16 3- 1/4 3- 5/16 3- 3/4 3- 3/4 3- 3/4 3-13/16 “ “ “ “ “ “ “ i 3.3.1.3 The outside diameter of the raised 3.4 Marking. - The size, heat number or manu- be concentric. The eccentricity of raised face with “MIL-F-20670“ shall be legibly stamped on the
18、 rim respect to bore shall not exceed 1/32 inch maximum. of all flanges for identification as shown on figures face and the outside diameter of the flange shall facturers lot code identification and Specification 1 through 4, the letters to be 1/4 to 1/2 inch hieh - 3.3.2 Drilling dimensions. - Unle
19、ss otherwise specified (see 6.2) flanges shall be furnished 3.5 Finish. - The mating surface of the flanges drilled as shown in table V. shall have a concentric or spiral serrated finish with 30 to 80 serrations per inch of face width, with ser- 3.3.2.1 Tolerance. - The tolerance for drill- ration d
20、epth of O. 002 to O. O10 inch. The tip of the hg dimensions shall be as shown in table VI. serrations shall not exceed O. O10 inch in width. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_c MIL- F“20670B(SHIPS) Table IV - Tolerances. All types (s
21、ee figures 1 Tppes A through 4) and C (see figures 1 Nominal Size and 3) L- All sizes 3 and under 3-1/2 and over 4-1/2 and under 5 to 10, inclusive Above 10 Inch +1/16 - 1/32 “ “ “ “ “ Nominal size Inches 1/4 3/8 1/2 3/4 1- 1/2 2-1/2 1 1-1/4 2 3 3-1/2 4 4-1/2 5 5-1/2 6 7 8 9 10 11 12 14 O. D. 15 O.
22、D. 16 O. D. 18 O. D. 20 O. D. “ + 1/8 +3/16 . -1/32 - 1/32 “ “ “ Pitch circle Inches 2- 1/8 2- 1/4 2- 7/16 2-11/16 3- 1/8 3- 3/8 3-15/16 4- 7/16 5 6- 1/16 6- 9/16 7- 1/16 7-13/16 8- 5/16 8- 7/8 10 11- 1/16 12- 3/8 13- 7/16 16- 1/16 17- 3/8 18- 3/8 19- 7/16 23-13/16 5- 1/2 15 21- 1/2 +1/8 -0 “ “ “ “
23、“ Table V - Drilling dimensions. Number of bolt holes 3 3 3 4 4 4 6 6 6 8 8 8 10 10 10 12 12 14 14 15 16 18 19 20 20 22 24 G Inch “ “ “ io. 008 +o. 012 f .O16 Diameter of drilled bolt holes Inches 9/16 9/16 9/16 9/16 9/16 9/16 9/16 9/16 9/16 9/16 9/16 9/16 9/16 11/16 11/16 11/16 11/16 11/16 13/16 13
24、/16 13/16 13/16 15/16 15/16 15/16 15/16 1- 1/16 Pitch chord Inches 1.84 L95 2.11 1.90 2.21 2.39 1.97 2.22 2.50 2.10 2.32 2.51 2.18 2.41 2.57 2.30 2.59 2.46 2.75 2 79 2.93 2.79 2.86 2.87 3.04 3.06 3.11 e - e a T Types BandD (see figures 2 and 4) -Inch I Inch I Inch “ *1/16 “_ “ “ “_ “ “ “- +o.oo I -0
25、.03 20.031 I - +O. O0 +O. 062 -0.06 1 -0.031 1 “ “ _“ “ Y Table VI - Tolerances for drilling dimensions. Eccentricity of Nominal respect to bore chord circle size pitch circle with Pitch Pitch (maximum) Inches 1/64 M.015 i1/64 All sizes Inch Inch Inch A 3.6 Workmanship. - The workmauship shall be fi
26、rst class in every respect. Flanges shall be smooth, flat, and free from laps, seams, and other defects. 4. QUALITY ASSURANCE PROVISIONS 4.1 The supplier is responsible for the per- formance of all inspection requirements as speci- fied herein. Except as otherwise Wecified, the supplier may utilize
27、his own or any other inspection facilities and services acceptable to the Govern- ment. Inspection records of the examination and testa shall be kept complete and available to the Goverpment a8 specified in the contract or order. The Government reserves the right to perform any of the inspections se
28、t forth in the specificationwhere such inspections are deemed necessary to assure supplies and services conform to prescribed re- quirementa. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-“ M-IL-F-206708 q7 W 7779906 0273864 2 MIL-F-20670B(SHIPS)
29、 4.2 Sampling for acceptance inspection. - 4.2.1 G- 4.2.1.1 Lot for visual and dimensional examina- tion. - For Duruoses of visual. and dimensional ex- . - amination, a 1; shall consist f all flanges of the same type and size presented for examination at one time. 4.2.1.2 Lot for chemical analysis.
30、- For pur- poses of chemical analysis, alot shall consist of all flanges produced from the same heat of steel. When flanges cannot be identified by heat, a lot shall consist of not more than l., O00 pounds of flanges. 4.2.1.3 Lot for tension test. - For purposes of the tension test, a lot shall cons
31、ist of all flanges produced from the same heat of steel and normal- ized in the same charge in a batch type furnace, or under the same conditions as to temperature and time in a continuous furnace, When flanges can- no be identified by heat, a lot shall consist of not more than 1,000 pounds of flang
32、es normalized in the same charge in a batch type furnace, or under the same conditions as to temperature and time in a continuous furnace. 4.2.2 Sampling for visual and dimensional ex- amination. - A random sample of flanges shall be selected from each lot for examination of visual and dimensional c
33、haracteristics as specified in 4.3 with lot acceptance based on the sampling re- quirements specified in table VII in accordance with Standard MIL-STD-105. Table M - Samplhg for visual and dimensional examination. Lot size (defective) (defective) flanges) flanges) Rejection Acceptance Sample size (n
34、umber of number . number (number of 15 and under 1 O 15 41 to 110 1 O 10 16 to 40 1 O 7 111 to 300 25 1 2 301 to 500 50 501 and over 2 1 35 3 2 .- 4.2.3 Sampling for tension test and chemical anal sis From each lot of flanges identifiable by h-. 2.1.2 and 4.2.1.3) one sample flange shall be selected
35、 for the tension test (see 4.4.1) and for chemical analysis (see 4.4.2)- When the flanges cannot be identified by heat samples shall be selected for tension and chemical analysis in accordance with table MI. 4 Table VIII - Sampling for tension and chemical analysis tests when the heat source is not
36、known. Lot size Sample number of Sample for (number of flanges to be selected flanges) for tension tests 1 to 25 26 to 50 Over 50 4.3 Visual and dimensional examination. - Each of the sample flanges selected in accordance with 4.2.1.1 shall be visually and dimensionally examined to verify compliance
37、 with all the requirements of this specifics- tion, not involving tests. Any flange having one or more defects shall be rejected and if the number of defective flanges in any sample exceeds the acceptance number for that sample, the lot represented by the sample shall be rejected. 4.4 Tests. - 4.4.1
38、 Tension test. - 4.4.1.1 Yield point and tensile strength. - The yield point shall be determined by the drop of the beam or halt in the gage of the testing machine, or by the use of dividers at a cross head speed of not to exceed 1/8 inch per minute. The tensile strength shall be determined at a spe
39、ed of head not to exceed 1-1/2 inches per minute. i i 4.4.1.2 Test specimens. - The tension test specimens shall conform to Standard FED-STD-151. 4.4.1.2.1 In the case of small sections which da not permittaking the type 1 specimen as specified in 4.4.1.2, the tension test specimen shall conform to
40、Standard FED-STD-151. When type 4 specimens are used they shall be made as large ao feasible. 4.4.1.3 For purposes of tension tests, .the nec- essary extra flanges or test baxs shall be provided. When test specimens are cut from a flange the specimens shall be cut tangentially from the flange sectio
41、n approximately midway between the inner and outer surfaces and approximately midway between the front and back faces. When it is llot practicable to provide extra flanges for test purposes, or when the flanges are not large enough to provide test specimens, test blanks may be made from the billet o
42、r forging bar used in the manufacture of the flanges, provided they are given approximately the same reduction and heat-treatment as for the finished flanges. . !: = I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M.L-F-20670B LI7 M 7777706 0273865
43、 m 4.4.1.4 If any tension test specimen fails to con- form to the requirements of 3.2 (table II), the lot shall be rejected. 4.4.2 Chemical analysis. - Sample flanges selected in accordance with 4.2.3 shall be sepa- rately analyzed to determine compliance with 3.2 (see table I). The sample shall be
44、free from dirt, grit, and other foreign matter, and shall consist of not more than 2 ounces. The samples shall be for- warded to a laboratory satisfactory to the bureau or agency concerned for analysis. If the analysis of any sample does not conform to the requirements of 3.2 (see table I) the lot r
45、epresented by the sample shall be rejected. 4.5 Preparation for delivery inspection. - The preservation, packaging, packing and marking shall be examined td determine conformance with Speci- fication MIL-V-3 and section 5 herein. 5. PREPARATION FOR DELIVERY 5.1 Domestic shipment and early equipment
46、in- stallation and for storage of onboard repair parts. - 5.1.1 Preservation and packaging. - Preserva- tion and packaging shall be su,fficient to afford adequate protection against corrosion, deteriora- tion and physical damage during shipment from the supply source to the using activity and until
47、early installation. 5.1.2 Packing. - Packing shall be accomplished in a manner which will insure acceptance by common carrier and will afford protection against physical or mechanical damage during direct shipment from the supply source to the using activity for early installation. The shipping cont
48、ainers or method of packing shall conform to the Uniform Freight Classi- fication Rules and Regulations or other carrier regulations as applicable to the mode of transporta- tion. 5.1.3 Marking. - Shipment marking information shall be provided on interior packages and exterior shipping containers in
49、 accordance with the con- tractors commercial practice. The information . shall include nomenclature, Federal stock number or manufacturers part number, contract or order number, contractors name and destination. 5.2 Domestic shipment and storage or overseas shiument. - The reauirements and levels of preser- vation, packaging, jacking and marking for ship- ment shall be speclfied by the procuring activity (see 6.2). (5.2.1 The fol
