Flange Tables, Bolt Sizing and Gasket Materials

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1 fwb Tech & Download Content Flange Tables, Bolt Sizing and Gasket Materials V2.14 1

2 Contents Flange Identification. Page 3 Flange Type Codes. Page 3 Flange Face Types. Page 4 DN Explanation. Page 4 Flange PCD. Page 4 Pressure Rating. Page 4 Gasket Materials. Page 5 Flange Tables for the Heating and Ventilating Industry BS10 and BS1560 (ANSI B16.5). Page 7 Temperature Pressure Ratings. Page 8 BS4504. Page 9 Approx. Bolting Torque. Page 10 CESWI 7 Compliance. Page 11 Bolt, Flange and Coupling Coatings. Page 12 2

3 Flange Tables, Bolt Sizing and Gasket Materials There are many different standards relating to the sizing and specification of flange & bolt sets world-wide, common ones include ASA / ANSI / ASME (USA), PN / DIN (EU), BS10 / BS4504 (British), and JIS / KS (Japanese / Korean). The British standards relate to metric sizing in the case of BS 4504 and imperial sizing for BS10. The American standard, ANSI is also used in Britain. Flange Identification: BS4504 / 111 / B PN16 DN400 - B4 - XXXX Flange Type Codes 101 Plate flange for welding 102 Loose plate flange with weld on plate collar 104 Loose plate flange with weld-nut collar 105 Blank flange 111 Weld neck flange 112 Hubbed slip-on flange for welding 113 Hubbed threaded flange 121 Integral flange Casting Number Manufacturer Material Designation Nominal Diameter Nominal Pressure Flange Face Type Flange Code Number British Standard 3

4 Flange Face Types Type A : Flat Face Type D: Grooved Face Type G: Ring Recess Type B: Raised Face Type E: Spigot Type H: O-Ring Groove Type C: Tongue Face Type F: Recess Nominal Diameter (DN) DN stands for Diameter Nominale, it is a translation between imperial and metric sizing, though not exact. 1/2 DN15 2 1/2 DN65 10 DN250 3/4 DN20 3 DN80 12 DN300 1 DN25 4 DN DN /4 DN32 5 DN DN /2 DN40 6 DN DN450 2 DN50 8 DN DN500 Flange PCD PCD Pitch Circle Diameter. Diameter described between centre of bolt holes. Pressure Rating PN stands for Pressure Nominale and prefixes the pressure rating, e.g. a PN16 flange is designed to operate up to 16 bar. Typical ratings include PN6, PN10, PN16, PN25, PN40, PN64, PN100. The American ANSI standard refers instead to a pressure / temperature rating termed Class. 4

5 Gasket Materials EDPM Effective for: hydraulic fluids, ketones, hot and cold water, and alkalis, heat, ozone and weather resistance. Not for: most oils, gasoline, kerosene, aromatic and aliphatic hydrocarbons, halogenated solvents and concentrated acids. Temp Range: -40 o C to +120 o C Natural Rubber / SBR Effective for: Acids & Bases, abrasion resistance Not for: Oils, oxidisaing agents, aromatics, hydrocarbons, sunlight, ozone, oxygen Temp Range: -40 o C to +80 o C Neoprene Effective for: weathering resistance, ozone, low gas permeability, seawater applications Not For: Low temperature operations Temp Range: -20 o C to +100 o C Nitrile Effective for: oils, hot oils, animal fats, acids & bases, heat and resistance to abrasion, gas. Not For: nozone, sunlight, or weather resistance Temp Range: -20 o C to +110 o C Butyl Effective for: Ozone, weathering, general chemical resistance, low gas & moisture permeability Not For: Oils, fuels, fats Temp Range: -40 o C to +100 o C 5

6 Viton Effective For: high temperatures, solvents, oils Not For: acetone, esters, ketones, low temperature applications or steam Temp Range: -10 o C to +250 o C Silicone Effective For: high and low temperatures, electrically insulating Temp Range: -60 o C to +220 o C Nitrile Bonded Cork Effective For: Thermal insulation, fuels, oils, refrigerants, solvents, vibration suppression Temp Range: -30 o C to +125 o C Fibre Paper Effective For: vegetable oils, fuel, petrol, petroleum distillates Temp Range: -20 o C to +120 o C 6

7 Flange Tables for the Heating and Ventilating Industry BS10 and BS1560 (ANSI B16.5) Bolts lengths are approx. for flange flange duty assuming one 1/16 gasket and one washer Flange thickness shown are the greatest thickness for any given rating BS10 are available are forged bossed or flat plate as standard, BS1560 are normally forged flanges Nominal Bore BS10 Table D BS10 Table E BS10 Table F Flange Dimensions Dia & Flange Dimensions Dia & Flange Dimensions In. Dia. In. Thick In. PCD In. No. Holes Bolts Dia. In. Thick In. PCD In. No. Holes Bolts Dia. In. Thick In. PCD In. No. Holes 1/2 3 3/4 3/16 2 5/8 4 M /4 1/4 2 5/8 4 M /4 3/8 2 5/8 4 M /4 4 3/16 2 7/8 4 M /4 2 7/8 4 M /8 2 7/8 4 M /2 3/16 3 1/4 4 M /2 9/32 3 1/4 4 M /4 3/8 3 7/16 4 M /4 4 3/4 1/4 3 7/16 4 M /4 5/16 3 7/16 4 M /4 1/2 3 7/8 4 M /2 5 1/4 1/4 3 7/8 4 M /4 11/32 3 7/8 4 M /2 1/2 4 1/8 4 M /16 4 1/2 4 M /8 4 1/2 4 M /2 5/8 5 4 M /2 6 1/2 5/ M /2 13/ M /4 5/8 5 3/4 8 M /4 3/8 5 3/4 4 M /4 7/16 5 3/4 4 M /8 6 1/2 8 M /2 3/8 7 4 M /2 1/2 7 8 M /4 7 1/2 8 M /2 8 1/4 8 M /16 8 1/4 8 M /8 9 1/4 8 M /2 9 1/4 8 M /16 9 1/4 8 M /8 10 1/4 12 M /2 10 1/4 8 M /4 10 1/4 8 M /4 7/8 11 1/2 12 M /4 1/2 11 1/2 8 M /4 3/4 11 1/2 8 M / /4 12 M /2 5/8 12 3/4 8 M /2 13/ /4 12 M / M / M / M / M / M M /4 1 1/4 17 1/4 16 M /4 7/8 18 1/2 12 M /4 1 1/8 18 1/2 12 M /4 1 3/8 19 1/2 16 M /4 7/8 19 1/2 12 M /4 1 1/4 19 1/2 12 M /4 1 1/2 20 1/2 16 M /4 7/8 20 1/2 12 M /4 1 1/4 20 1/2 12 M /8 21 3/4 20 M / M /4 1 3/ M /2 1 3/ M /4 1 1/8 25 1/4 16 M /4 1 1/2 25 1/4 16 M /2 24 M /2 1 1/4 29 3/4 16 M /2 1 7/8 29 3/4 16 M /2 2 1/4 30 3/4 24 M Dia & Bolts 7

8 Hex Round Hex (HRH) Bolts to BS4190 Standard Bolt Sizes 1/2" M12 1" M24 5/8" M16 1 1/4" M30 3/4" M20 Nominal Bore BS10 Table H BS1560 ANSI B16.5 Class 150 BS1560 ANSI B16.5 Class 300 Flange Dimensions Dia & Flange Dimensions Dia & Flange Dimensions In. Dia. In. Thick In. PCD In. No. Holes Bolts Dia. In. Thick In. PCD In. No. Holes Bolts Dia. In. Thick In. PCD In. No. Holes 1/2 4 1/2 1/2 3 1/4 4 M /2 7/16 2 3/8 4 M /4 9/16 2 5/8 4 M /4 4 1/2 1/2 3 1/4 4 M /8 1/2 2 3/4 4 M /8 5/8 3 1/4 4 M /4 9/16 3 7/16 4 M /4 9/16 3 1/8 4 M /8 11/16 3 1/2 4 M /4 5 1/4 11/16 3 7/8 4 M /8 5/8 3 1/2 4 M /4 3/4 3 7/8 4 M /2 5 1/2 11/16 4 1/8 4 M /16 3 7/8 4 M /8 13/16 4 1/2 4 M /2 3/4 5 4 M /4 4 3/4 4 M /2 7/8 5 8 M /2 7 1/4 3/4 5 3/4 8 M /8 5 1/2 4 M / /8 8 M /8 6 1/2 8 M /2 15/ M /4 1 1/8 6 5/8 8 M /2 8 M /16 7 1/2 8 M /4 7 7/8 8 M /8 9 1/4 8 M /16 8 1/2 8 M /8 9 1/4 8 M /8 10 1/4 12 M /2 8 M /2 1 7/ /8 12 M /4 1 1/4 11 1/2 12 M /2 1 1/4 12 3/8 12 M /2 1 1/8 11 3/4 8 M / M / M / M / /4 12 M /2 1 7/8 15 1/4 16 M /4 1 5/8 17 1/4 16 M / M / /4 16 M /4 1 7/8 19 1/2 16 M /8 1 3/8 12 M /8 20 1/4 20 M / /2 16 M /8 21 3/4 20 M /2 1 7/ /4 16 M /2 2 1/4 22 1/2 20 M Dia & Bolts /2 2 3/ M / /4 16 M /8 24 3/4 24 M /8 26 1/2 24 M /2 1 11/ M /2 2 1/ M / /4 24 M /8 29 1/2 20 M / M

9 Flange Tables for the Heating and Ventilating Industry BS4504 Bolts lengths are approx. for flange flange duty assuming one 1/16 gasket and one washer Flange thickness shown are the greatest thickness for any given rating BS4504 (Metric) flanges are available as forged, bossed or plate flanges as standard Nominal BS 4504 Table 6 BS 4504 Table 10 BS 4504 Table 16 Bore Flange Dimensions Dia. & Bolts Flange Dimensions Dia. & Bolts Flange Dimensions Dia. & Bolts mm Dia. Thick PCD No. Holes Dia. Thick PCD No. Holes Dia. Thick PCD No. Holes M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M Hex Round Hex (HRH) Bolts to BS 4190 Standard Bolt Sizes 1/2 M12 1 M24 5/8 M16 1 1/4 M30 3/4 M20 9

10 Nominal Bore Approx. Bolting Torque (Nm) To 10 bar To 16 bar To 20 bar To 25 bar Nominal BS 4504 Table 25 B20S 4504 Table 40 BS 4504 Table 64 Bore Flange Dimensions Dia. & Flange18 Dimensions Dia. & Flange Dimensions Dia. & mm Dia. Thick PCD No. Bolts Dia. Thick18 PCD No. Bolts Dia. Thick PCD No. Bolts Holes (mm18) Holes Holes M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M M

11 CESWI 7 Compliance The Civil Engineering Specification for Water Industry (CESWI), 7 th edition, is now the standards document for all civil engineering works. The document stipulates that the bolts in flange joint sets must be of sufficient length to ensure that nuts are fully threaded when tightened with at least two threads showing when in their final tightened position. Also that washers must be used both under the head of the bolt, and under the nut. fwb stock and supply CESWI 7 compliant sets containing appropriate bolt lengths, each with two washers. Typical sizes would include: Nominal Bolt Size Number Diameter Diameter of bolts (DN) M M M M M M M M27 16 Nominal Diameter (DN) Bolt Size Diameter Number of Bolts M M M M M M M M

12 Bolt, Flange and Coupling Coatings Galvanised Rilsan Coatings In production since 1947 polyamide-11 or Rilsan is conceptually similar to nylon and perlon and comes from the same chemical family as other leading materials such as Kevlar and Nomex. Powdered Rilsan coatings are ideal for use in the water industry, it offers: o UV resistance o Compliance with all standards (AWAA, EEC, French, Germany, Belgium, Australian, Italian, Dutch, Japanese, British etc.) o High levels of corrosion resistance o High resistance to abrasion and impact damage Sheraplex Coatings Sheraplex is a viable alternative to Rilsan. The Sheraplex process is a Duplex system which provides excellent corrosion protection provided by a Sherardizing process combined with an organic barrier layer. o A more consistent Torque/load ratio can be achieved o Sheraplex coating does not gall when re-used, meaning nuts & bolts can be used repeatedly o Long term vibration testing has shown difference in the performance of Sheraplex compared to Rilsan o The coating process is considered by some to be more environmentally friendly than others 12

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