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PDF HG/T 20627-2009 English (HG 20627-1997: Older version)


Search result: HG/T 20627-2009 (HG 20627-1997 Older version)
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
HG/T 20627-2009English85 Add to Cart 0-9 seconds. Auto-delivery. Non-metallic flat gaskets for use with steel pipe flanges (Class designated) Valid
HG 20627-1997EnglishRFQ ASK 9 days (Steel pipe flanges with a non-metallic flat gaskets (American System)) Obsolete

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HG/T 20627-2009: PDF in English (HGT 20627-2009)

HG/T 20627-2009 Chemical Industry Standard of the People's Republic of China HG Replacing HG 20627-1997, HG 20629-1997 Non-metallic Flat Gaskets for Use with Steel Pipe Flanges (Class Designated) (Class)系列 ISSUED ON. FEBRUARY 5, 2009 IMPLEMENTED ON. JULY 1, 2009 Issued by. Ministry of Industry and Information Technology of the People’s Republic of China Contents 1. Scope ... 3  2. Normative references ... 3  3. Material and working conditions ... 3  4. Gasket type and dimension ... 6  5. Technical requirements ... 14  6. Marking illustration ... 15  1. Scope This standard specifies the type, dimension and technical requirements of non-metallic flat gaskets (with insertion or without insertion) for use with steel pipe flanges. This standard is applicable to the non-metallic flat gaskets for use with steel pipe flanges whose nominal pressures from C1assl50 (PN20)-C1ass600 (PN110) are specified in HG/T 20615 and HG/T 20623. Note. As for the use of the gaskets in which contain the material of asbestos, it shall meet the requirements of the relevant laws and regulations. If the aforesaid gaskets are used, the protective measures shall be adopted to prevent man from damaging. 2. Normative references The following provisions contained in the following standards are turned into the provisions of this national standard by being referred in this national standard. For date reference, the subsequent amendments to (excluding amending error in the text) or revisions of, any of these publications do not apply. And parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, its latest edition referred to applies. GB/T 528 "Rubber, Vulcamized or Thermoplastic--Determination of Tensile Stress-strain Properties" GB/T 539 "Oil-resisting compressed asbestos fiber jointing" GB/T 3280 "Cold rolled stainless steel plate sheet and strip" GB/T 3985 "Compressed asbestos fiber jointing" HG/T 20615 "Steel Pipe Flange (Class Designated)" HG/T 20623 "Major Diameter Steel Pipe Flange (Class Designated)" HG/T 20635 "Specification for Selection of Steel Pipe Flange, Gaskets and Bolting (Class designated)" JB/T 6613 "The classification code and sign of flexible graphite sheets/strip" JB/T 6628 "Reinforced flexible graphite (sheets) gaskets" JB/T 7758.2 "Specifications of flexible graphite sheets" QB/T 3625-1999 "PTFE sheet" 3. Material and working conditions 3.0.1 Material category The materials of the non-metallic flat gaskets for use with steel pipe flanges contain. 1 Natural rubber, neoprene, styrene-butadiene rubber, chemigum, ethylene propylene diene copolymer and viton; manufacturer's brand shall be indicated. The applicable pressure, temperature and maximum (P×T) value of the gaskets shall be determined according to the working condition. 3.0.3 Working Conditions Working conditions of the nonmetallic flat gaskets shall meet the requirements of Table 3.0.3. Table 3.0.3 Working Conditions of Non-metallic Flat Gaskets Classification Name Standard Code name Application Range Maximum (p×T) (MPa×℃) Nominal pressureC1ass Working temperature (℃) Rubber Natural rubber NR 150 -50-+80 60 Neoprene CR 150 -20-+100 60 Chemigum NBR 150 -20- +110 60 Styrene-butadiene rubber SBR 150 -20-+90 60 Ethylene propylene diene copolymer EPDM 150 -30-+140 90 Viton FKM 150 -20-+200 90 Asbestos rubber Paronite GB/T 3985 XB350 150 -40-+300 650 XB450 Oil-resisting paronite GB/T 539 NY400 Non asbestos fiber rubber Non asbestos fiber rubber pressing-a Inorganic fiber b NAS ≤300 -40-+290-d Organic fiber -40-+200 -d Teflon PTFE sheet QB/T 3625 PTFE -50-+100 Expansion PTFE sheet/strip b.c ePTFE -200-+200-d Stuffing modified PTFE sheet RPTFE ≤300 Flexible graphite sheets Reinforced flexible graphite sheet-e JB/T 6628 JB/T 7758.2 RSB ≤600 -240-+650(used in oxidative medium. -240 - +450) High-temperature mica High-temperature mica composite plate ≤600 -196-+900 Note. 1 Reinforced flexible graphite sheet is compounded by stainless steel impacting or punch drying plate and expanded graphite particle. And stainless steel impacting or punch drying plate plays a role in enhancement. Table 4.0.2-1 The Dimension Ff-type Gasket for Use with Flat Face Flange Class150 (PN20) (mm) Nominal dimension Inside diameter of the gasketa Dl Outside diameter of the gasket D2 Number of bolt hole n (piece) Diameter of bolt hole L Diameter of bolt-hole center circle Gasket thicknessb T DN NPS 15 21 22 89 4 16 60.3 1.5c 20 411 27 98 4 16 69.9 25 1 34 108 4 16 79.4 32 411 43 117 4 16 88.9 40 211 49 127 4 16 98.4 50 2 6l 152 4 18 120.7 65 212 77 178 4 18 139.7 80 3 89 191 4 18 152.4 100 4 115 229 8 18 190.5 125 5 141 254 8 22 215.9 150 6 169 279 8 22 241.3 200 8 220 343 8 22 298.5 250 10 273 406 12 26 362.0 300 12 324 483 12 26 431.8 350 14 356 533 12 30 476.3 3d 400 16 407 597 16 30 539.8 450 18 458 635 16 33 577.9 500 20 508 699 20 33 635.0 600 24 610 813 20 36 749.3 a D1 is the maximum inside diameter of the gasket. The other diameters of the internal diameters gasket may be determined by the user, but it shall be indicated at the order time. b Gasket thickness T listed in the table is recommended gasket thickness. c Rubber blanket thickness is larger than or equal to 1.5mm. d Rubber blanket thickness is larger than or equal to 3mm. (Continued) (mm) Nominal dimension Inside diameter of the gasketa Dl Outside diameter of the gasket D2 Nominal pressure C1ass Gasket thicknessb Wrapping width b DN NPS 125 5 140 196.0 215.0 240.0 1.5 150 6 169 221.5 250.0 265.0 200 8 220 278.5 306.0 319.0 250 10 273 338.0 360.5 399.0 300 12 324 408.0 421.0 456 350 14 356 449.5 484.5 491 400 16 407 513.0 538.5 564.0 450 18 458 548.0 595.5 612 500 20 508 605.0 653.0 682.0 600 24 610 716.5 774.0 790.0 a D1 is the maximum inside diameter of the gasket. The other diameters of the gasket may be determined by the user, but it shall be indicated at the order time. b Gasket thickness T listed in the table is recommended gasket thickness. Table 4.0.2-4 RF- and RF-E-type Gasket Dimension for Use with the Raised Face Flange (HG/T 20623 B Designated) Whose Nominal Diameter is Larger than DN600 (mm) Nominal dimension Inside diameter of the gasketa D1 Outside diameter of the gasket D2 Gasket thicknessb Wrapping width b DN NPS Nominal pressure Class 650 26 660 724.5 770.0 764.5 700 28 711 775.5 824.0 818.5 750 30 762 826.0 885.0 879.0 800 32 813 880.0 939.0 932.0 850 34 864 933.5 993.0 998.0 900 36 914 985.5 1047.0 1049.0 950 38 965 1043.0 1098.0 1000 40 1016 1093.5 1148.5 1050 42 1067 1144.5 1199.5 1100 44 1118 1195.5 1250.5 1150 46 1168 1254.0 1317.0 1200 48 1219 1305.0 1368.0 1250 50 1270 1356.0 1419.0 1300 52 1321 1406.5 1469.5 1350 54 1372 1462.0 1530.0 1400 56 1422 1513.0 1595.0 1450 58 1473 1578.5 1657.0 1500 60 1524 1629.0 1708.0 a D1 is the maximum inside diameter of the gasket. The other diameters of the gasket may be determined by the user, but it shall be indicated at the order time. b Gasket thickness T listed in the table is recommended gasket thickness. Table 4.0.2-6 TG-type Gasket Dimension for Use with Tongue and Groove Face Flange Class300 (PN50)-Class600 (PN110) (mm) Nominal dimension Inside diameter of the gasket D1 Outside diameter of the gasket D2 Gasket thicknessa Nominal dimension Inside diameter of the gasket D1 Outside diameter of the gasket D2 Gasket thicknessa T DN NPS DN NPS 15 21 25.5 35.0 1.5a 150 6 190.5 216.0 1.5a 20 43 33.5 43.0 200 8 238.0 270.0. 25 1 38.0 51.0 250 10 286.0 324.0 32 411 47.5 64.0 300 12 343.0 381.0 40 211 54.0 73.0 350 14 374.5 413.0 3a 50 2 73.0 92.0 400 16 425.5 470.0 65 212 85.5 105.0 450 18 489.0 533.0 80 3 108.0 127.0 500 20 533.5 584.0 100 4 132.0 157.0 600 24 641.5 692.0 125 5 160.5 186.0 a Gasket thickness T listed in the table is recommended gasket thickness. 5. Technical requirements 5.0.1 Dimension tolerance of FF-type and RF-type gaskets shall meet the requirements of Table 5.0.1. 5.0.2 Dimension tolerance of MFM-type and TG-type gaskets shall meet the requirements of Table 5.0.2. Table 5.0.1 Dimension Tolerance of FF-type and RF-type Gaskets (mm) Nominal dimension ≤DN300 (NPSl2) ≥DN350 (NPSl4) Inside diameterD1 ±1.5 ±3.0 Outside diameter D2 -1.5 -3.0 Diameter K of FF-type bolt-hole center circle ±1.5 Adjacent bolt hole center distance ±0.75 Table 5.0.2 Dimension Tolerance of MFM-type and TG-type Gaskets (mm) Inside diameter D1 Outside diameter D2 +1.0 -1.0 5.0.3 Thickness tolerance of the 1.5mm-thickness gasket is±0.1mm; and thickness tolerance of the gasket whose thickness is larger than or equal to 3mm is±0.20mm. The thickness difference of the same gasket shall not be larger than 0.20mm. 5.0.4 Gasket shall be flat and without buckling deformation. there shall not be slag inclusion, crack, bubble, extr... ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.