NAVY MIL-STD-1627 C-1994 BENDING OF PIPE OR TUBE FOR SHIP PIPING SYSTEMS《船舶管系统弯管》.pdf
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1、NOTE: MIL-STD-1627 has been redesignated as a Design Criteria Standard. Thecover page has been changed for Administrative reasons. There are no otherchanges to this Document.MIL-STD-1627C (SH)30 SEPTEMBER 1994_SUPERSEDINGMIL-STD-1627B (SH)2 SEPTEMBER 1981(See 6.6)AMSC N/A FSC 4710DISTRIBUTION STATEM
2、ENT A. Approved for public release; distribution isunlimited.INCH-POUNDDEPARTMENT OF DEFENSEDESIGN CRITERIABENDING OF PIPE OR TUBEFOR SHIP PIPING SYSTEMSProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-STD-1627C(SH)FOREWOIU)t:, .:., 1. This Military
3、 Standard is approved for use by the Naval Sea SystemsCommand, Depar-nt of the Navy, and is available for use by all Departments andAgencies of the Department of Defense.2. Beneficial comments (recommendations,additions, deletions) and anypertinent data which may be of use in improving this document
4、 should be addressedto: Commander, Naval Sea Systems Command, SEA 03R42, 2531 Jefferson Davis Hwy,Arlington, VA 22242-5160 by using the self-addressed Standardization DocumentImprovement Proposal (DD Form 1426) appearing at the end of this document or byletter. 3, This standard covers fabrication re
5、quirements and acceptance criteria forpipe bending.4. For Naval activities, this document may be invoked upon receipt.5. For contracts or acquisition orders which invoke NIL-STD-1627A(SH),MIL-STD-1627B or NAVSHIPS 250-582, the contractor or vendor shall not use thisstandard without prior contractual
6、 approval.iiProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MXL-STD-1627C(SH)-,.-I.IV,- :. $.:.-.Paragraph 1.1.12.2.12.1.12.22.33.3.13.1.13.23.33.43.4,13.4.23.4.33.4.43.4.53.53.63.73.83.93.103.113.123.133.143.153.163.174.4.1.4s1,14.1.24.1.34.1.44.24.2.
7、14.34.44.55.5.15.2SCOPE ”-.”.”o”o.”.oScope ”APPLICABLE DOCUMENTS .Government documents Specifications, standards, andhandbooks Non-Government publications ,Order of precedence .DEFINITIONS o.”.”-”ooo”oActivity ”.“”Authorized representative .Backwall .”s”.”6”Bend radius .”Bending machines .-.”Bending
8、 machine -Ram tyPe .“Bending machine -Roll we ”Bending machine - Compression type Bending machine -RotarY type ”.”.Bending machine - Rotary type with a booster Buckles and bulges Cold bending .”.”-Crack .Dent ”sFlatness ”o”,Gouge Hot bending .”.”Hump o,.”o.o”“”liinimumdesign wall thichess .Pipe Qual
9、ified .Step ”.”Wrinkles “.GENERAL REQUIRME.NTS .Material Do”.”Base material condition. Base material cleanliness .Wall thickness ”Surface condition .s.”.Lubricants .”Unacceptable lubricant ingredients Cleaning “”Loose fillers -.”.Material contro .”DETAILEDBendingBendingREQUIREMENTS -oo-.-procedures
10、procedure qualification .iii1111122223333333444444444444455555555569999910Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-STD-1627C(SH)CONTENTS - ContinuedParagraph 5.2.15.2.25.2,35.2.45.2.55.2.65.2.75.35.3.15.3.25.3.35.45.4.15.4.25.4.35.4.45.55.5.
11、15.5.1.15.5.25.65.6.15.6.25.6.35.6.45.75.7.15.7.25.7.35.85.8.15.8.25.8.35.95.9.15.9.1.15.9.1.25.9.1.35.9.1.45.9.1.55.9.25.9.2.15.9.2.2Production bends as qualification test .Bending machine qualification Alternative procedures .Qualification test approval Previously qualified procedures Vendor quali
12、fication .Transferal of qualification .Qualification test .Sampling .Special requirements .Qualification bends Bending criteria .Minimum bend radius Bending of longitudinallywelded pipe Marking Bending temperatures .Hot bending !0Heating of pipes .Torch heating Temperature measurements during heatin
13、g andbending .Adjustments and corrections Bend angle adjustment in the closing direction .Bend angle adjustment in the opening direction .Reverse bending Corrections for out-of-round, buckles, bulges,and dents .Post bending heat treatment General Cleaning prior to heat treatment .Procedure Inspectio
14、n .Inspection procedures Sampling .Inspection personnel .Acceptance standards .Surface conditions .Cracks .Pits, gouges, scratches and tool marks .Wrinkles .Buckles, bulges, humps, steps and dents Flatness .Dimensional Out-of-roundness .Wall thickness measurement .10101010101010111111111111111111121
15、212131313131313131313131414151515151515151515151616ivProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-STD-1627C(SH)Paragraph 6.6.16.26.36.46,56,6Figure 1. “2.3.4.I.11.111,IV.NOTES 0,00.*oo*s”Intended use .o+Acquisition requirements a71 *Obsolete spe
16、cifications referenced by this standard.Maintenance of records .Subject term (keyword) listing .!Changes from previoUsissw FIGURESTypes of bending machines Location of weld for welded pipe .calculations for buckles, bulges, humps, steps,and dents in pipe ben.; . 4: : . . . .1.1 $CODC. This standard
17、covers pipe bending, heat treatment, andinspection requirements and acceptance criteria for piping used for ships of theUnited States Navy. The standard applies to pipes of 1/4 nominal pipe size (rips)and larger or tubes with 1/2 inch outside diameter (od) and larger,2. APPLICABLE DOCUMENTS .2.1 gov
18、ernment doc.2.1.1 $Decfic tions. stantir S.a d and handbo . The following specifi-cations, standards, and handbooks form a part of this document to the extentspecified herein. Unless otherwise specified, the Issues of these documents arethose listed in the issue of the Department of Defense Index of
19、 Specifications andStandards (DODISS) and supplement thereto, cited in the solicitation (see 6.2).SPECIFICATIONSFEDERALQQ-N-281/3MILITARYMIL-T-15005HIL-T-16286MIL-T-16420MIL-T-23226MIL-T-23227MIL-T-23520MIL-T-24107MIL-P-24338t41L-P-24691/lMIL-P-24691/2MIL-P-24691/3STANDARDSMILITARY.-.-.MIL-STD-271 -
20、MIL-STD-278 -Nickel-Copper Alloy, Tube and Pipe, Seamless.Tubes, Condenser and Heat Exchanger, Copper-NickelAlloys (UNS C70600 wrotating bending die, clamping block, wiper die and sliding or stationarypresstiedie aB Bhown on figure ld. The clamping block holds the end of the pipe to thebending die w
21、ith sufficient force to keep it from moving while it is being bentaround the die. The bending die rotate8 around a pivot and pulls or draws thepipe around it. The bending die also supports the inner half or throat of thepipe bend. The pressure die presses the pipe into the groove of the bending die.
22、The pressure die also supports the outer half or heel of the pipe bend. Thepressure die may be stationary or slide with the pipe. The wiper die isstationary and opposite the pressure dies. The wiper die supports the inner halfof the pipe and keeps the pipe throat from wrinkling. The maximum angle of
23、 bendis 180 degrees.3.4.5 endi - Rotary twe With a booster. This machine isessentially the rotary -e bending machine with the force being applied to thestraight end of the pipe. This force reduces the pull on the pipe to bend itaround the bending die as shown on figure le. Booster unit enables small
24、er radiusbends to be made on the pipe.3.5 Buckles and bul, A wavy condition which may form on the pipe throatsurface during the bending operation.3.6hardening3.73.83.93.10Cold bending. The bending of pipe at any temperature at which strainoccurs. A crevice, fissure, rupture, or fracture of the pipe
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