This standard replaces JB 89-59. JB/T 89-1994 Metal ring gasket for pipeline flanges JB/T89-1994 Standard download and decompression password: www.bzxz.net
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J15 JB Mechanical Industry Standard of the People's Republic of China Pipeline Flanges and Gaskets Published on December 9, 1994 Published by the Ministry of Machinery Industry of the People's Republic of China Implemented on October 1, 1995 Mechanical Industry Standard of the People's Republic of China Metal Ring Gaskets for Pipeline Flanges Subject Content and Scope of Application This standard specifies the types, sizes and technical requirements for octagonal metal ring gaskets for steel pipe flanges. JB/T 89—94 JB89-59 This standard applies to metal ring gaskets for ring-joined integral cast steel pipe flanges and butt-welded steel pipe flanges with nominal pressure PN of 6.3, 10.0, 16.0, 20.0MPa as specified in JB/T79 and JB/T82, and references standards 2 GB699 GB1220 JB755 3 High-quality carbon structural steel Stainless steel bars Technical conditions Pressure vessel forgings Technical conditions Type and size of gasket The type and size of metal ring gaskets shall conform to the requirements of Figure 1 and Table 1. Figure 1 Approved by the Ministry of Machinery Industry on December 9, 1994 Implemented on October 1, 1995 101 Nominal Diameter DN 10 15 20 25 32 40 50 65 80||tt ||100 125 150 (175) 200 (225) 250 300 350 400 450 500 4 p 35 35 45 5 0 65 75 85 110 115 145 175 205 235 265 280 320 375 420 480 540 590|| tt||PN6.3MPs A 8 00 8 2 2 2 11 11 11 11 11 11 13 Technical requirements 4.1 4. 2 c 5.5 5. 5 5. 5 5. 0 8 0 0 8 8 8 H 13 13 13 13 13 16 16 16 16 16 16 16 16 16 16 16 16 20 P 35 35 45 50 65|| tt||75 85 110 115 145 175 205 235 265 280 320 375 420 480 JB/T89-94 Table 1 PN10.0MPawwW.bzxz.Net A 11 11 11 11 11 11 11 11 11 11 15.5 15. 5 C 5. 5 8 8 8 10. 5 10.5 H 13 6 16 16 16 16 16 16 22 22 35 160 190 205 255 275 305 330 380 PN16.0 MPa A 11 11 13 15.5 15.5 15.5 21 c 5.5 5.5 5.5 5.5 5.5 90 00 9 10.5 10. 5 10.5 10.5 H 13 13 13 13 13 13 16 16 16 16 20 22 22 22 22 ||28 P 40 40 45 50 65 75 95 110 160 190 205 240 275 305 330 380 PN20.0 MPs A 8 8 11 11 11 13 15.5 15.5 15.5 21 The gasket material and applicable temperature range shall comply with the provisions of Table 2. Other technical requirements shall comply with the provisions of relevant standards. Table 2 Material name 08 or 10 oCr13 oCr19Ni9.oCr17Ni12Mo2 Standard GB699 GB1220 GB1220 Maximum working degree 450 540 600 C 5.5 5. 5 5.5 5.5 5.5 9 10.5 10.5 10.5 10.5 14 mm H 13 13 13 13| |tt||13 16 16 16 16 20 22 22||tt ||22 22 28 The hardness value of the metal ring gasket material should be 30~40HB lower than the hardness value of the flange material, and its maximum value should not exceed the requirements in Table 3 . Table 3 Material name 08 or 10 OCr13 OCr19Ni9 0Cr17Ni12Mo2 102 Maximum hardness value| |tt||HB 120 140 160 160 JB/T89-94 4.3 Hardness of metal ring pad It should be measured uniformly around the entire circle, symmetrically everywhere, and the average hardness should comply with the requirements in Table 3. 4.4 The metal ring gasket should be made of forgings and undergo appropriate heat treatment and mechanical processing. The plated parts should meet the "grade requirements" of JB755. The metal ring gasket is not allowed to be mixed. 4.5 The limit deviation of the metal ring gasket size should comply with The provisions of Table 4. Table 4 Name Pitch P Ring width A Ring height H Ring plane Width C Angle 23* Corner radius, Limit deviation ± 0. 18 ±0. 20 ± 0. 40 ±0. 20 ±0. 5* ±0. 40 mm 4.6 Metal ring gasket sealing surface ( The octagonal pad bevel) shall not have scratches, marks, cracks and warts, and the surface roughness R. is 1.6um. 4.7 If the metal ring pad is cut from 08 or 10 steel, the surface should be coated with anti-rust oil after inspection. . 5 Marking and packaging 5.1 Metal ring pads should be packaged separately according to specifications and materials, and the product quality inspection certificate should be attached when delivered. 5.2 The manufacturer's trademark and Mark content such as nominal pressure, nominal diameter and material grade, 5.3 marking example Octagonal metal ring gasket with nominal diameter 150mm, nominal pressure 10.0MPa, material 0Cr13: Octagonal gasket 150-100.0Cr13JB/T8994 additional Note: This standard was proposed by the Mechanical Standardization Institute of the Ministry of Machinery Industry. This standard was drafted by the Mechanical Standardization Institute of the Ministry of Machinery Industry and Beijing Huaguang Seals Factory. The main drafters of this standard are Li Junying, Ye Baolong, and Li Xinhua, 103. Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.