bsen12516-4-20xxindustrialvalves—shelldesignstrength—part4calculationmethodforvalveshellsmanu

bsen12516-4-20xxindustrialvalves—shelldesignstrength—part4calculationmethodforvalveshellsmanu内容摘要：

opper alloys — Plate, sheet and circles for boilers, pressure vessels and hot water storage units EN 17593:2020, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, Class designated — Part 3: copper alloy flanges EN 1982:1998, Copper and copper alloys — Ingots and castings EN 12163:1998, Copper and copper alloys — Rod for general purposes EN 12420:1999, Copper and copper alloys — Fings EN 12449:1999, Copper and copper alloys — Seamless, round tubes for general purposes BS EN 125164:2020 EN 125164:2020 (E) 5 Licensed Copy: Manchester ATHENS, University of Manchester, 22/10/2020 12:29, Uncontrolled Copy, (c) BSI EN 125162:2020, Industrial valves — Shell design strength — Part 2: Calculation method for steel valve shells EN 12982:2020, Industrial valves Endtoend and centretoend dimensions for butt welding end valves ISO 70052, Metallic flanges — Part 2: Cast iron flanges ISO 70053, Metallic flanges — Part 3: Copper alloy and posite flanges 3 Symbols and units Table 1 — Symbols and units Symbol Characteristic Unit c1 tolerance mm c2 corrosion allowance mm e wall thickness mm f nominal design stress MPa or N/mm2 fd Maximum value of the nominal design stress for normal operation load cases MPa or N/mm2 fd/t nominal design stress for design conditions at temperature t 176。 C MPa or N/mm2 Rm minimum tensile strength N/mm2, MPa Rm/t tensile strength at temperature t 176。 C MPa or N/mm2 Rp0,1 minimum 0,1 %proof strength at temperature t 176。 C N/mm2, MPa Rp0,2 minimum 0,2 %proof strength N/mm2, MPa Rp0,2/t 0,2 % — proof strength at temperature t 176。 C MPa or N/mm2 Rp1,0/t 1,0 % — proof strength at temperature t 176。 C MPa or N/mm2 TS maximum/minimum allowable temperature 176。 C  extra thickness due to casting process mm  casting tolerance mm BS EN 125164:2020 EN 125164:2020 (E) 6 Licensed Copy: Manchester ATHENS, University of Manchester, 22/10/2020 12:29, Uncontrolled Copy, (c) BSI 4 Interrelation of thickness definitions Key ec calculated wall thickness emin minimum wall thickness including corrosion allowance c2 corrosion allowance c1 =    manufacturer allowance c1 e0 , e1 total wall thickness Figure 1 — Interrelation of thicknesses definitions The manufacturer shall decide the thickness allowance for corrosion or other chemical attack. 5 Requirements General When materials specified in followi ng tables are not available, other suitable materials may be used when the technical documentation defining the characteristics of these materials has been accepted in accordance with the requirements for European Approval for Materials (EAM) or Particular Material Appraisal (PMA). The calculation method for a valve shell in materials other than steel shall be in accordance with EN 125162. The choice of materials and their parameters shall be taken from the following clauses of this European Standard. BS EN 125164:2020 EN 125164:2020 (E) 7 Licensed Copy: Manchester ATHENS, University of Manchester, 22/10/2020 12:29, Uncontrolled Copy, (c) BSI Materials — Cast iron General Materials shall be in accordance with Table 2. Table 2 — Allowable material grades Graphite structure Standard Rm N/mm2 Designation Symbol Number Grey cast iron EN 1561 EN 1561 200a 250 ENGJL200 ENGJL250 ENJL1030 ENJL1040 Spheroidal graphite cast iron EN 1563 EN 1563 EN 1563 EN 1563 EN 1563 EN 1563 EN 1563 EN 1563 EN 1563 EN 1563 EN 1563 350 350 350 400 400 400 400 400 500 600 700 ENGJS35022LT ENGJS35022ULT ENGJS35022RT ENGJS40018 ENGJS40018LT ENGJS40018RT ENGJS40015 ENGJS40018ULT ENGJS5007 ENGJS6003 ENGJS7002 ENJS1015 ENJS1019 ENJS1014 ENJS1020 ENJS1025 ENJS1024 ENJS1030 ENJS1049 ENJS1050 ENJS1060 ENJS1070 Malleable cast iron EN 1562 EN 1562 300 350 ENGJMB3006 ENGJMB35010 ENJM1110 ENJM1130 a Grade 200 shall not be used for valves with flanged connections PN 25 or above. Material properties shall be taken from the material standards listed in Table 2. Calculation parameters Calculation parameters shall be in accordance with Table 3 to Table 4 Table 3 — Strength values for wall thickness up to 60 mm Material grade Characteristic value Strength characteristics Rp0,2 at operating temperature in 176。 C 20 100 150 200 250 300 350 N/mm2 ENGJS7002/2U Rp0,2 420 400 390 370 350 320 280 ENGJS6003/3U Rp0,2 370 350 340 320 300 270 220 ENGJS5007/7U Rp0,2 320 300 290 270 250 230 200 ENGJS40015/15U Rp0,2 250 240 230 210 200 180 160 ENGJS40018/18ULT Rp0,2 240 230 220 200 190 170 150 ENGJS35022/22ULT Rp0,2 220 210 200 180 170 150 140 BS EN 125164:2020 EN 125164:2020 (E) 8 Licensed Copy: Manchester ATHENS, University of Manchester, 22/10/2020 12:29, Uncontrolled Copy, (c) BSI Table 4 — Strength values for wall thickness 60 mm up to 200 mm Material grade Characteristic value Strength characteristics Rp0,2 at operating temperature in 176。 C 20 100 150 200 250 300 350 N/mm2 ENGJS7002/2U Rp0,2 380 340 330 320 300 280 250 ENGJS6003/3U Rp0,2 340 300 290 280 260 240 190 ENGJS5007/7U Rp0,2 290 250 240 220 200 180 160 ENGJS40015/15U Rp0,2 240 220 210 190 180 170 150 ENGJS40018/18ULT Rp0,2 220 210 200 180 170 160 140 Tensile strength values for grey c。