BS 4504 Circular Flanges - General

1 - Hyupshin FlangesABS 4504 Circular Flanges - GeneralBritish Standard BS 4504 : Section : 1989 - Circular Flanges for Pipes, Valves andFittings (PN Designated), Specification for Steel Flanges . This covers Flanges in nominalpressure ranges PN to PN 40 and nominal sizes up to DN 4000 (see table below). BS 4504 substantially agrees with ISO 7005-1 : 1992 (E) Part 1 : Steel 4504 : 1969 is still commonly used. This older standard allows for manufacture frombar, whereas the latest standard specifies that forging or plate are to be used, which canbe significantly more expensive. There are minor differences in dimensions between thetwo versions. The following tables are based on the later > DN 2000, are not covered in this summary. -Dimensions: Nominal sizes, DN followed by a numerical designation of size (a convenient round number for reference purposes), are used as defined in ISO Ratings: Nominal pressures, PN followed by a numerical designation of size (a convenient round number for reference purposes), are used as defined in ISO 7268.

2 1 Dimensions for these Flanges are not covered in this DN range for weld neck Flanges extends to DN 4000 for PN , to DN 3600 for PN 6, and to DN 3000 for PN All Flanges are marked with BS number, code number, PN, DN, material designation, manufacturersname or trade mark, cast number or melt identification, thread identification, An example follows:Summary of Flanges covered by BS 4504 : Section RangeDN Range101 Plate flange for welding(see page 8-65)PN 10 to DN 2000PN 6, 10, 16, 25, 40DN 10 to DN 600102 Loose plate flange with weld-on plate collar or for lapped pipe end(Weld-on plate collar = Code 1321 Lapped pipe end = Code 1331)PN 6, 10, 16, 25, 40DN 10 to DN 600104 Loose plate flange with weld-neck collar (Weld-neck collar = Code 1341)PN 6, 10, 16, 25, 40DN 10 to DN 600105 Blank flange (see page 8-70)PN , 6DN 10 to DN 2000PN 10, 16DN 10 to DN 1200PN 25, 40DN 10 to DN 600111 Weld-neck flange (see page 8-66)PN , 6, 10, 16DN 10 to DN 20002PN 25DN 10 to DN 1000PN 40DN 10 to DN 600112 Hubbed slip-on flange for welding (see page 8-68)PN 6DN 10 to DN 300PN 10, 16, 25, 40DN 10 to DN 600113 Hubbed threaded flange (see page 8-69)

3 PN 6, 10, 16, 25, 40DN 10 to DN 150121 Integral flangePN 6, 10, 16, 25DN 10 to DN 2000PN 40DN 10 to DN 600BS 4504 /111/B - PN 16 - DN 400 - B4 - XXX - 12345 Cast Number or melt identificationManufacturer s name or trade markMaterial designationNominal size, DNNominal Pressure, PNFlange face type (A - H) flange code numberBritish standard - Hyupshin Flanges8-61 ABS 4504 Circular Flanges - GeneralDimensions and TolerancesDimensionRangeTolerancemmFlang e Facings (see page 8-63)Eccentricity of machined facing diameters< DN > DN (type B facing height) 2 mm+0, mm+0, mm+0, mm+0, mm+0, (type C and E facing height)All+ , -0b (type G facing height)All+0, (type H facing height, outer)All+ , -0c (type D and F facing height)All+0, (type H facing height, inner)All+ , -0B and E (facing diameters)All+0, and D (facing diameters)All+ , -0 Surface FinishFacing types A, B, E and FAll, turningRa = m m maxAll, other than turningRa = m m maxFacing types C, D, G and HAllRa = m m maxFlange Drilling Details (see page 8-64)B (diameter of bolt circle)Bolt sizes M10 to M24 sizes M27 to M45 to centre of adjacent bolt holesBolt sizes M10 to M24 sizes M27 to M45 (outside diameter)< DN 150 > DN 150 < DN 500 > DN 500 < DN 1200 > DN 1200 < DN 1800 > DN 1800 ( flange thickness, machined on both faces)< 18 mm thickness > 18 mm < 50 mm thickness > 50 mm thickness ( flange thickness, machined on front face)< 18 mm thickness+ , > 18 mm < 50 mm thickness+ , > 50 mm thickness+ , Neck Flanges , Code 111(see page 8-66)B (outside diameter of hub at welding end)< DN 125+ , -0> DN 125 < DN 1200+ , -0> DN 1200+ , -0F (hub diameter)< DN 50+0, > DN 50 < DN 150+0, > DN 150 < DN 300+0, > DN 300 < DN 600+0, > DN 600 < DN 1200+0, (length through hub)

4 < DN 80 > DN 80 < DN 250 > DN 250 on, Code 112 (see page 8-68) and Threaded, Code 113 (see page 8-69) FlangesE (slip on flange hub diameter)B (threaded flange hub diameter)< DN 50+ , -0> DN 50 < DN 150+ , -0> DN 150 < DN 300+ , > DN 300 < DN 600+ , -0> DN 600 < DN 1200+ , -0> DN 1200 < DN 1800+ , -0> DN 1800+ , -0B (slip on bore diameter)< DN 100+ , -0> DN 100 < DN 400+ , .0> DN 400 < DN 600+ , .0> DN 600+ , -0D (length through hub)Same as Weld Neck DBlank Flanges , Code 105 (see page 8-70)B ( flange thickness)Same as C for all other flangesC (unmachined centre portion)Maximum - Hyupshin FlangesABS 4504 Circular Flanges - GeneralWeld Neck flange - Welding EndsWelding end for Wall Thickness (t) from 5 mm mmWelding end for Wall Thickness (t) > mmFlange Facings - BS 4504BS 4504 flange facing types A to H are defined below. The dimensions vary with pipe size (DN) and pressurerating (PN) as detailed in the following - Hyupshin Flanges8-63 ABS 4504 Circular Flanges - GeneralManufacture Materials.

5 flange codes 111 112 and 113 aremanufactured from a forging or steel steel forgings conforming to ASTMA 182, have an additional requirement for gradeF304L and F316L that carbon content (by ladleanalysis) shall be max. Forgings to BS 1503 and comparable ASTM standard grades specified in BS 4504 are aslisted in the following facing dimensions (BS 4504 )DNmmFace DimensionsPN 6PN 10PN 16PN 25PN 40mmmmmmmmmmmmmmmmmmmm103535404040403435 24232432-515404045454545394029282432-520 50505858585850513635243241 16'52560606868686857584342243241 16'53270707878787865665150243241 16'54080808888888875766160343241 16'550909010210210210287887372343241 16'56511 011012212212212210911 09594343241 16'5801281281381381381381201211061053432 41 16' 15' 15' 15' 15' 15' 15'6350415415430438450465421422395394454 327 24'7400465465482490505535473474447446454 327 24'7450520520532550555560523524497496454 327 24'7500570570585610615615575576549548454 327 24'7600670670685725720735675676649648554 327 24'7700775775800795820-77777875175055432 7 24'7800880880905900930-88288385685555432 7 24'7900980980100510001030-98798896196055 4327 24'71000108010801110111 511 40-1092109410621060565428 39'8120012801295133013301350-12921294126 21260565428 39'8140014801510153515301560-14921494146 21460565428 39'8160016901710176017501780-16921694166 21660565428

6 39'8180018901920196019501985-19821894186 21860565428 39'8200020902125217021502210-20922094206 22060565428 39'8BS and ASTM forging grades in BS 4504BS 1503 GradeASTM A 182 - Hyupshin FlangesAFlange Drilling Details - BS 4504 . DNPN Bolt & 67550114M1010,16, & 68055114M1010 & 169565144M1225 & & 69065114M1010 & 1610575144M1225 & & 610075114M1010 & 1611585144M1225& & 612090144M1210 & 16140100184M1625 & & 6130100144M1210 & 1615011 0184M1625 &4015011 & 614011 0144M1210 & 16165125184M1625 & & 6160130144M1210 & 16185145184/8M1625 & & 6190150184M1610 & 16200160188M1625 & & 6210170184M1610 & 16220180188M1625 & & 6240200188M1610 & 16250210188M1625 & & 6265225188M1610 & 16285240228M2025 & & 6320280188M1610 & 16340295228 & & & & & & & & & & & 6117511 203028M2710123011 603628M3316125511 Bolt - Hyupshin Flanges8-65 APlate Flanges (Code 101) - BS B is the flange thickness with or without araised drilling details see page tolerances see page facing types and dimensions see page , &16901425 & & 680122210 &16951425 & & &161051625 & & &1611 51625 & 4011 & &161401825 & & &161501825 & & & 161652025 & & & 161852025 & & &162002025 & & 62101811 &162202225 & & & 162502225 & & & 162852425 & & & & & & & & & & be specified by - Hyupshin FlangesAWeld Neck Flanges (Code 111) - BS , , , , , , , , , ,6210114.

7 , , , , , , , , - Hyupshin Flanges8-67 ANotes-For drilling details see page tolerances see page facing types and dimensions see page be specified by the , , Neck Flanges (Code 111) - BS - Hyupshin FlangesASlip On Flanges (Code 112) - BS 4504 Notes-The hubs of slip on (code 112) Flanges are parallel or have a draft <7 drilling details see page tolerances see page facing types and dimensions see page &169014203025 & 40901622301568022122030310 &169514203525 & &1610516244525 & &1611 516245225 & 4011 &1614016266025 & &1615016267025 & & 1616518288425 & & 16185183210425 & &16200203411825&402002440118100621011 &16220204014025& & 16250224416825 & & 16285224419525 & & - Hyupshin Flanges8-69 AThreaded Flanges (Code 113) - BS flange (code 113) threads are tapered or parallel. BS 21 or ANSI/ASME threads may be specified (see Section 10).-The hubs of threaded (code 113) Flanges are parallel or have a draft <7 drilling details see page tolerances see page facing types and dimensions see page 55216244011 5521828326120601426516140601626401406018 3040613070142651615070162640150701832506 1408014285161658418284016584203465616010 0143261618510418324018510422388061901101 6346162001182034402001182440100621013016 406162201402040402351452444 DNPN mmmmmmmmmm125624016018446162501682244402 7017026481506265185184481628519522444030 0200285220063202402044816340246244440375 2603452250637529522441016405298264640450 3123860300644035522441016460350284640515 3804267350165204003057104058042446724001 6580456326310406604785078450166405023468 1240685522508450016715559347312407555765 2906001684065836831240890686601007001691 07603683128001610258643890129001611 - Hyupshin FlangesABlank Flanges (Code 105)

8 - BS B is the range thickness with or without araised C is the maximum diameter of the centreportion of a blank flange face which need not drilling details see page tolerances see page facing types and dimensions see page , 67512-10 &169014-25 & & 68012-10 &169514-25 & & 69014-10 &1610516-25 & & 610014-10 &1611 516-25 & 4011 & 612014-10 &1614016-25 & & 613014-10 &1615016-25 & & 614014-10 & 1616518-25 & & 6160145510 & 16185185525 & & 6190167010 &16200207025& & 6210169010 &16220209025& & 62401811 510 & 162502211 525 & 402702611 & 62651814010 & 162852214025 & & 63202019010 & & 63752223510 & & & & & & 5468601611 7542-611 601614857611