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I have studied and compiled the information on blind plates available on the forum, in the hope of providing some help to those who come across it. Thank you! If a blind flange with a 11.0MPA rating has a 40mm hole, can’t it be used with equipment rated at 1.0MPA? How should a blind flange for a 6 kg pipeline with a length of 22,400 mm be selected? What type of flange is suitable for an 8-shaped blind flange on a 34 MPa synthetic gas pipeline? Should 48-character blind plates, 58-character blind plates, 68-character blind plates, and 78-character blind plates be installed before the valve or after it? 88 words: Standards for blind flanges; 40T0189: Use of 89-word blind flanges; 108 words: Problems with blind flanges? 118 Word description of blind flanges and their functions. 12 ASME B16.48-2005: Steel blind flanges for pipelines (English version). 13 CB 1144-85 P30: Steel flanges for blind flanges. 14 HG 23013-1999: Safety regulations for installing and removing blind flanges in industrial areas. 15 HG/T 21547-1993: Steel plug plates, gaskets, and U-shaped blind flanges for pipelines. 16 JB/T 2772–1992: Blind flanges with a pressure range of pN16.0~32.0 MPa. 17 Standards for blind flanges with a pressure range of PN16.0～32.0 MPa. 18 What standard is used for U-shaped blind flanges with a pressure of PN6.3 MPa? 19. Is it necessary to install blind flanges on safety valves? 20. Sensory impressions of wedge-shaped blind flanges 21. Specifications of wedge-shaped blind flanges 22. Is it necessary to use gaskets between wedge-shaped blind flanges and flanges when they are in use? 23. Safety management for plug-and-remove blind flanges 24. Blind flanges for large pipelines carrying catalytic cracking oil and gas 25. Time required to install large blind flanges for oil and gas during catalytic unit shutdowns 26. Why are blind flanges used instead of valves in the reaction oil and gas lines of catalytic units? 27 How to use the gasket ring in a blind flange? 28 Can a valve be used as a substitute for a blind flange? 29 Technical parameters of materials for flanges and blind plates 30 Standards for steel pipeline blind plates: ASME B16.48 (Chinese & English) & HG21547-93 31 What is the difference between the functions of partitions and blind plates? 32 What is the formula for calculating the minimum wall thickness of temporary blind plates used for strength and pressure testing of industrial pipelines, and what are the underlying principles? 33 Information on the installation of blind plates, gas-liquid seals, steam traps, static mixers, etc., in process systems – in WORD format. 34 Regarding 8-shaped blind plates. 35 On the use of 8-shaped blind plates. 36 On the use of 8-shaped blind plates. 37 Issues related to 8-shaped blind plates. 38 About 8-shaped blind plates. 39 Regarding flanges and blind plates. 40 What is the direction of blind plates in flow diagrams? 41 Questions regarding blind plates 42 Issues related to air leakage when blind plate valves operate 43 Concerns about blind plates and steam heating coils 44 Blind plates for pressure testing 45 Should an 8-shaped blind plate or a valve be used at the end of a pipe? 46 Table for selecting the thickness of blind plates used for pipeline pressure testing 47 Selection of blind plates for pipeline pressure testing 48 Standards for chemical industry blind plates and gaskets 49 Is it necessary to install blind plates at both the inlet and outlet of heat exchangers? 50 Why are blind plates required at both the inlet and outlet of heat exchangers or towers? What is the structure of the 51 quick-open blind flange and the 52 quick-open blind flange? 53 Material of the sealing ring for quick-opening blind flanges 54 Drawings of quick-opening blind flanges 55 Management of “blind flanges” in petrochemical enterprises 56 Bubbling often occurs at the gasketed area of the manhole blind flanges in phosphate concentration units 57 Bubbling often occurs at the gasketed area of the manhole blind flanges in phosphate concentration units 58 Blind flanges 59 Blind flanges 60 Differences between blind flanges, blind flange connections, and isolation valves 61 Safety regulations for blind flanges 62 Thickness of blind flanges 63 Thickness of blind flanges 64 Thickness of blind flanges 65 Calculation of the thickness of blind flanges 66 Calculation of the thickness of blind flanges 67 Installation of blind flanges 68 Installation of blind flanges 69 Installation of blind flanges 70 Installation of blind flanges 71 Problems related to blind flanges 72 Functions of blind flanges 73 Calculation of blind flange connections? 74 Management methods for blind plates 75 Blind plate management system 76 What is the role of blind plates and 8-shaped blind plates in process design? What is the difference between installing a blind plate before and after a shut-off valve? 78 Blind plate design methods 79 Locations where blind plates should be installed 80 Blind plates and safety valves 81 Sequence of blind plates and gate valves 82 Does anyone have a standard management system and record-keeping system for blind plates? 83 Sir, could you recommend some reliable manufacturers of gas blind valve assemblies? 84 Does your factory have blind plate permits? 85 What is the detailed structure of blind plates used in urine towers, and what are the welding requirements? 86 Issues related to the force on blind plates in expansion joints. 87 Before connecting oxygen to a vaporization furnace after removing the blind plate, how should one test the leak-tightness of the blind plate flange? 88 Question: How should the bolt length be determined when an 8-shaped blind plate is installed between a valve and a flange? 89 Question: Should an 8-shaped blind plate be placed before or after a shut-off valve? How is this decided? 90. Ask for the steps involved in installing and removing blind flanges. 91. Ask about quick-release blind flanges. 92. What is a “blind flange”? 93. Request information on the symbols used in the PID diagrams for blind flange fittings. 94. An explosion occurred at a fertilizer factory in Shandong Province due to premature removal of blind flanges. 95. What is a hammer-type blind flange? 96. What is blind flange force? What is its magnitude, and how is it generated? 97. Design of valves and blind flanges on LD pipelines in petrochemical plants 98 Pressure testing blind plates 99 Calculation of the thickness of pressure testing blind plates 100 Simple formula for determining the thickness of pressure testing blind plates 101 Selection of the minimum thickness for blind plates used in pressure testing 102 Why 8-shaped blind plates are generally not used for pipes with a diameter of DN300 or more 103 Can an 8-shaped blind plate be installed after the flare valve in a scrubber tower? 104 Many blind plates are installed due to the variety of products and the risk of oil cross-contamination in the pipelines 105 Dimensions related to 8-shaped blind plates 106 Could someone please provide some information on blind plates? Thank you! 107 What should be done for welding pipelines when it is not possible to install blind plates? 108 How can safety be ensured when installing large blind plates at the bottom of a fractionation tower during shutdown? Is it necessary to install a blind flange on the 109 steam trap? 110 Is it necessary to install blind flanges on the main circulating water pipeline of Unit 110 at the boundary area? 111 When Unit 111 is first started up and purged, are blind flanges installed at the unit’s boundary area to prevent materials from entering from external sources or to prevent materials from exiting from the unit itself? 112 Who is responsible for managing the blind flanges in the unit? 113 When performing a leak test, blind flanges are installed at the inlet and outlet of the pump – does this change the direction of the check valve at the pump’s outlet? This post was last edited by 7979815 on 2009-2-4 04:17]