1、ASTM F423950759510057825B4714F423TABLE 3 Tolerances for Plpe,Flanges,and Fittings,in.(mm)ment,shall be hydrostatically or spark tested in accordancePipe:with 6.2.1.1 or 6.2.1.2 and shall subsequently be visuallyLengthh仕3.)Fixed flenge bolt hole alignment4w壮1.6)inspected to verify conformance to the
2、requirements of 5.4.Flange perpendicularity(with pipee in./ft(7.8 mm/m)of dameter6.Test MethodsAll dimensionsSee ANSI B16.42 or ANSI B16.56.1 Qualification Tests:Fittings:6.1.1 Temperature Test-Cycle representative productionSee ANSI B16.42 or ANSI B16.5samples of lined pipe and fittings in an oven
3、from roomtemperature to 500F(260C)to determine the ability of the5.2 Flange Construction:lined components to withstand heat aging and temperature5.2.1 Screw-type flanges shall be secured in position tocycling.Test a minimum of two pipe spools,tees,and 90prevent inadvertent turning of the flange.elbo
4、ws in each size5.2.2 Socket-type flanges shall be fully backwelded to the6.1.1.1 Test Method-Install blind flanges with a centerpipe housing and the inside surfaces of the socket flangesvent hole at the manufacturers recommended torque value,shall be ground smooth.and affix a thermocouple to the fer
5、rous housing to measure5.2.3 Slip-on flanges shall be fully backwelded.the temperature.Pipe spools shall be at least 3 ft(1 m)longNorg 3-No welding shall be done on lined components in the fieldup to the 4-in.size and 10 pipe diameters in sizes 6 in.andunless absolutely necessary and then only under
6、 the supervision oflarger to a 10-ft(3-m)maximum length.After I h in an ovenexperienced and qualified personnel,since excessive beat can causeat 500F(260C)as indicated by the thermocouple,air coollinear decomposition and failure.It is recommended that lined compo-the lined component to 122F(50C)maxi
7、mum.Repeat thisnents be hydrostatically tested as specifled in 6.2.1.1 after any welding intest for a total of three cycles.the field.6.1.1.2 Inspection-Inspect lined pipe and fittings after5.2.3.1 Modified slip-on flanges used as lap-joint flangeseach cycle for distortion or cracks in the lining.At
8、 themay be used with flared laps formed by flaring the pipe.Thecompletion of the third cycle,subject tested specimens to theradius of the fillet of the flared lap shall not exceed in.(3.8hydrostatic or electrostatic test described in 6.2.1.1 or6.2.1.2.mm)and the backing flange for the flared metalli
9、c lap shallhave a-in.bevel or-in.corner radius at the bore to6.1.2 Steam-Cold Water Cycling Test-Subject represen-provide clearance for the fillet of the flared lap.The outsidetative production samples of lined pipe and fittings todiameter of the flared lap shall be in accordance with thesteam-cold
10、water cycling to determine the ability of the lineddimensions of an ANSI B16.9 lap-joint stubcomponents to withstand rapid temperature changes.Test a5.2.4 Lap-joint(or Van Stone)flanged ends may beminimum of two pipe spools,tees,and 90 elbows in eachmanufactured by standard forming techniques or by
11、usingsifully welded Type A MSS SP-43 or ANSI B16.9 lap-joint6.1.2.1 Test Method-Assemble lined pipe and fittingstub ends.Van Stone flares shall have a fillet radiuswith suitable blind flanges having provision for the introduc-compatible with the corner radius of the mating flange andtion of steam,ai
12、r,cold water,and for drainage.Install theshall not contain any cracks or buckles.Van Stone flares andflanges using the manufacturers recommended torque value.stub ends shall have a radius to provide a smooth transitionPipe spool length shall be 10 ft(3 m).Mount the sample infor the PTFE flare.Only l
13、ap joint flanges in accordance withsuch a manner as to permit complete drainage and venting.ANSI B16.42 and B16.5 shall be used.Then subject it to 100.consecutive steam-cold water cycles5.3 Venting-Each pipe and fitting shall be provided witheach consisting of the following in the soquence given:a v
14、enting system that will release any pressure between the(/Circulate 125+5 psi(86235 kPa)gage saturatedliner and the housing.steam through the sample until the ferrous housing skintemperature adjacent to the flange at the outlet end of theNoTB 4-A series of Vis to 5z-in.(1.6 to 4.0-mm)diameter holes
15、inthe housings,or a helical groove system inside the housing.that connectssample has been maintained at the maximum stabilizedflange vents,has provided adequate venting.temperature for 10 min.(2)Close off steam.5.4 Workmanship:(3)Circulate water at a maximum temperature of 77F5.4.1 Pipe and fitting
16、linings shall show no evidence of(25C).Circulate the cooling water until the ferrous housingpinholes,porosity,or cracks when inspected in accordanceskin temperature adjacent to the flange at the outlet end ofwith 5.5.2.The linings shall fit snugly inside the pipe andthe sample measures 122F(50C).fit
17、ting housings.Any bulges or other obvious indication of(Vent and introduce air to purge the sample for apoor contact with the housing shall be cause for rejection.minimum of I min,making certain that it is completely5.4.2 The gasket seating surface of the linings shall be freedrained of water.of sur
18、face defects that could impair sealing effectiveness.6.1.2.2 Inspection-There shall be no evidence of leakageScratches,dents,nicks,or tool marks on the seating surfacefrom the venting system during the 100 cycles.At theshall not be deeper than 10%of the wall pletion of the test,the liner shall evide
19、nce no buckling.5.5 Performance:cracking,or crazing.Formation of water blisters shall not be5.5.1 Qualification-Lined pipe and fittings must be ca-cause for rejection.pable of meeting the qualification requirements specified in6.1Nore 5-These surface blisters are formed due to absorption of the5.5.2
20、 Inspection-Each spool and fitting,prior to ship-steam vapors by the liner and subsequent condensation in the liner.Theblisters do not adversely affect liner performance.Copyright by the American Society For Testing Malerialsun Sep0713:32:592003ASTM F42395075951005782b002T4F423Nors 9-In federal cont
21、racts,the contractor is responsible forSTD-129 for military agencies.inspection.10.2 Packaging and Marking for U.S.Government Pro-NorE 10-The inclusion of U.S.Government procurement require-ments shall not be construed as an indication that the U.S.Governmentcurement:uses or endorses the products de
22、scribed in this document.10.2.I Packaging-Unless otherwise specified in the con-tract,the material shall be packaged in accordance with thesuppliers standard practice in a manner ensuring arrival at11.Quality Assurancedestination in satisfactory condition,and that will be accept-11.1 When the produc
23、t is marked with this designation,able to the carrier at lowest rates.Containers and packingF 423,the manufacturer affirms that the product was man-shall comply with Uniform Freight Classification rules.ufactured,inspected,sampled,and tested in accordance with10.2.2 Marking-Marking for shipment shal
24、l be in accor-this specification and has been found to meet the require-dance with Fed.Std.No.123 for civil agencies and MILments of this specificationThe American Soclety for Testing and Materlals takes no position respecting the valldity of any patent rights asserted in connectionpetent righs,and
25、therisknghts.arnrythwnpyThis standard is subfect to revision at any time by the responsible technical committee and must be revlewed every five yoars andand should be addressed to ASTM Headquarters.Your comments wil recelve carefuaf consideration at a meeting of the responsibletechnical commt which you myndIyou thyour comments hev not c hring you ahould make yourviews known to the ASTM Comme on Standards,100 Barr Harbor Drive,West Conshohocken,PA 19428.5Copyright by the American Sociely or Testing MaterialsSun Sep0711:33:052003
