JB/T 1120-1999 This standard is a revision of JB 1120-81 "Double-sided detachable connectors". During the revision, some steel grades were modified; the thickness of the round plate was personalized. This standard specifies the varieties, specifications, technical requirements, marking and packaging of double-sided detachable connectors. This standard is applicable to the connection between the tray and the tray plate of plate tower equipment in the chemical and petroleum industries. This standard was first issued in 1981. JB/T 1120-1999 Double-sided detachable connectors JB/T1120-1999 standard download decompression password: www.bzxz.net
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ICS75.180 Machinery Industry Standard of the People's Republic of China JB/T1120-1999 Double-sided dismountable fastenings1999-07-12 Issued National Bureau of Machinery Industry 2000-01-01 Implementation JB/T1120-1999 This standard is a revision of JB1120-81 "Double-sided dismountable fastenings". Compared with JB1120-81, the main technical content of this standard has been changed as follows: some steel grades have been modified; the thickness of the round pad has been modified. This standard replaces JB1120-81 from the date of implementation. This standard is proposed and managed by Lanzhou Petroleum Machinery Research Institute. The responsible drafting unit of this standard: Lanzhou Petroleum Machinery Research Institute. Drafters of this standard: Dong Yiliang and Li Xianbiao. This standard was first issued in 1968; this revision is the second revision. This standard is interpreted by Lanzhou Petroleum Machinery Research Institute. 1 Scope Machinery Industry Standard of the People's Republic of China Double-sided dismountable fastenings Double-sided dismountable fastenings This standard specifies the varieties, specifications, technical requirements, marking and packaging of double-sided dismountable fastenings. This standard applies to the connection between tray plates and tray plates of plate tower equipment in the chemical and petroleum industries. 2 Referenced standards JB/T1120—1999 Replaces JB1120—81 The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 96--1985 GB/T 196-1981 GB/T 702-1986 GB/T 912-1989bZxz.net GB/T 12201992 Big pad drawing A and C grade General thread basic dimensions (diameter 1~600mm) Hot-rolled round steel and square steel dimensions, shape, weight and allowable deviation Carbon structural steel and low alloy structural steel Hot-rolled thin steel plate and steel strip Stainless steel floor I type hexagonal nut A and B grade GB/T6170—1986 JB/T1205—1980 3 Variety specifications Tower tray technical conditions 3.1 Double-sided detachable connector consists of studs, elliptical pads, washers and nuts. Its structure, dimensions, materials, etc. are shown in Figures 1 to 3 and Table 1. 3.2 The sum of the thickness of the applicable connected parts should not exceed 12mm. 3.3 If materials not specified in Table 1 are required, they can be separately proposed when ordering and indicated in the drawings. 4 Technical requirements 4.1 The plate used to manufacture the double-sided detachable connector shall comply with the requirements of GB/T912: the profile shall comply with the requirements of GB/T702 and GB/T1220. 4.2 The thread of the stud shall be manufactured according to the common thread of GB/T196. 4.3 The nut shall adopt the GB/T6170 large angle nut M10. 4.4 The washer shall adopt the GB/96 washer 10. Approved by the Machinery Industry Bureau on July 12, 1999, and implemented on January 1, 2000 Liuyuan plate Tower plate 1 JB/T1120-1999 /From any front inspection, after turning the new medical pad to the / line position, the tower plate can be freely removed Figure 1 JB/T 1120-1999 Figure 2 Oval pad Figure 3 Stud Round pad Q235-A oCr18Ni9 0Cr18Ni10T 0Cr17NiI2Mo2 Marking and packaging 5.1 Marking JB/T1120-1999 Q235-A oCr18Ni9 or OCr18Ni10T 0Cr17Ni12Mo2 The marking of double-sided detachable connectors consists of two parts: -SL- means "double-sided Removable connecting parts\; number 0Cr18Ni9 or OCr18Ni10Ti 0Cr17Ni12Mo2 Q235-A 0Cr18Ni9 or 0Cr18Ni10T 0Cr17Ni12Mo2 -A-indicates that the material of the round pad, washer and nut is Q235-A, and the material of the stud is 1Cr13; B-indicates that the material of the elliptical hot plate, pad, stud and nut is 0Cr18Ni9 or 0Cr18Ni10Ti: C--indicates that the material of the elliptical pad, washer, stud and nut is 0Cr17Ni12Mo2. Marking example: Double-sided detachable connector made mainly of carbon steel Q235-A is marked as: Double-sided detachable connector SLAJB/T1120—1999 If the user requires, the mark can be printed on the surface of the finished product. The printing method and marking content shall be agreed upon by the supply and demand parties. 5.2 Packaging The acceptance and packaging of double-sided detachable connectors shall comply with the provisions of JB/T1205. Each set of heavy scenery 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.