HG 21524-1995 Horizontal Lifting Cover with Neck Welding Flange Manhole. Attached Figure HG21524-1995 Standard Download Decompression Password: www.bzxz.net
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Horizontal lifting cover with neck butt welding flange manhole HG 21524-95 Subject content and scope of application This standard specifies the type, basic parameters, dimensions, technical requirements and relevant use regulations of horizontal lifting cover with neck butt welding flange manhole made of carbon steel and low alloy steel. This standard is applicable to horizontal lifting cover with neck butt welding flange manhole with nominal pressure PN2.5~6.3MPa and working temperature limited to the range specified in Table 3-2 according to material category. Note: The nominal pressure and working temperature in Table 3-2 are only applicable to the pressure-bearing parts of the manhole, excluding gaskets. The nominal pressure and working temperature of the gasket should be determined according to the corresponding gasket standard. HGJ 50—91 HGJ 52—91 HGJ 53--91 HGJ 61--91 HGJ 62-- 91 HGJ 65-91 HG J 69--91 HGJ 70 - 91 HGJ 71—91 HGJ 72-91 HGJ 74-91 HGJ 75—91 GB 91—86 GB 95-85 GB 41-86 HG 21514--95wwW.bzxz.Net Referenced standards 《Raised face butt welding steel pipe flange with neck》 《Concave and convex face butt welding steel pipe flange with neck》 《Grooved face butt welding steel pipe flange with neck》 《Ring joint face butt welding steel pipe flange》 《Raised face steel flange cover》 《Grooved face steel flange cover》 《Ring joint face steel flange cover》 《Asbestos rubber sheet gasket for steel pipe flange》 《Flexible graphite composite gasket for steel pipe flange》 《Steel flange with neck》 "Polytetrafluoroethylene coated gaskets for pipe flanges" "Spiral wound gaskets for steel pipe flanges" "Metal ring gaskets for steel pipe flanges" "Fasteners for steel pipe flanges" "Split pins" "Flat washers, Grade C" "Type I hexagonal nuts, Grade C" "Types and technical conditions for manholes and handholes made of carbon steel and low alloy steel".. Types, basic parameters and dimensions The types, basic parameters and dimensions of manholes are shown in the figure below and the provisions of Tables 31 to 3-3. 10 | | tt | GB 41—86 Cylinder section 1 Gasket 1 Flange cover 20 (forging) Asbestos rubber sheet gasket Flexible graphite composite gasket PTFE coated gasket Supporting plate Note: For materials of this type, flange cover with bz>48mm uses 16MnD forgings. 98 16MnDR (forging) Spiral wound pad Metal ring 16MnDR (forging) 40Cr35CrMoAl 30CrMoA 16Mn(forging) Asbestos rubber sheet pad Flexible graphite composite pad PTFE coated pad Q235-A+F Q2 35-A·F Q235--AF Q235--A·F 16MnDR Table 3—1 15CrMoR 15CrMo (forging) Spiral wound gasket Metal ring gasket 15CrMoR 35CrMoA 30CrMoA 15CrMoR -- -- -- Shock-free working pressure table at working temperature Maximum shock-free working pressure 2.01.751.501.250.88 [2.382.25 12. 452. 382.252.0 Table 3—2 2.232.182.051.85 2.52.372.282 5.295.295.295.1 5.295.295.1 16.055.61 3.64 13.563 | | tt | | 3.4813.282.96 | | tt | | 3.723.152.21 |67 Note: ①The maximum non-impact working pressure at the intermediate temperature can be determined by interpolation according to the pressure value in this table. ②When the flange cover of type material is made of steel plate, its lower limit working temperature is -30℃. 99 Sealing surface type Ring connection surface ( 426X12 398/620550|300 450670|600/320214 480×12 530X12|500730 6001845 600X12 426X14 480X 14 | | tt | 0 595890 398620||t t||4501670 530X121500 340213 7301660 426×14 13986601585 530X14 426×18||tt| |426X12 480X12 (500) (530X12 | 951755 320|215 340219 360225 585350 550300205 660|3402 610/340 6703602 25 386|670585350227 426X12/398 620/550/300 480×12450670600320 426X14 480×14 426×18 398660 4481685 386670585350240 Stud nut 4304820 495/48 Qiu3—3 Diameter×length M33X2X17 0 M33X2X175 M33X2X180 M36X3X205 M36X×3X210 M36X3X215 M39X3X225 M45X3X245
M33X2X175 M33X2X1801315 M36X3X210 M36X3X215 M39X3X225 M39X3X235 M33×2X170|| tt||M33X2X175 M33X2X180 M36X3X210 M36X3X215 M39X3X225 M39×3X235 M33×2×195 M33X2X200 M36X3X235 M36X3X240 M39X3X260 Note: ① The height H of the manhole is determined by the diameter of the container being not less than twice the nominal diameter of the manhole; if there are special requirements, changes are allowed, but the changed H size must be indicated and the total mass of the manhole must be corrected. ② The nominal diameters in brackets in the table should not be used as much as possible. 100 Technical requirements The technical requirements of manholes shall comply with the provisions of Chapter 4 "Technical Conditions" in HG21514. 101 Marking example Nominal pressure PN2.5, nominal diameter DN450, H1=320, RF type sealing surface, V-type material, gasket outer ring material is low carbon steel, metal belt is 0Cr19Ni9, non-metallic belt is flexible graphite, C-type winding gasket horizontal lifting cover with neck butt welding flange manhole, the specified marking symbol is: Manhole RF (WC-1220) 450--2.5HG21524-95H,=350 (non-standard size) The above example manhole has the specified marking symbol: Manhole RFV (WC-1220) 450-2.5 Hi=350 HG21524-95102 Additional Notes The proposed unit, the editor-in-chief unit and the main drafters of this standard Equipment Design Technology Center of the Ministry of Chemical Industry Proposed unit: Editor-in-chief: China Tianchen Chemical Engineering Company Main drafters: Li Wenren, Zhao Cheng and Shen Pengfei103 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.