Some standard content:
Industry Standard of the People's Republic of China
21637-1991
Chemical Pipeline Filter
200001—17
200005-01
Ministry of Chemical Industry of the People's Republic of China
Industry Standard of the People's Republic of China
Chemical Pipeline Filter
HG/T21637-1991
Editor: China Hualu Engineering Corporation
Approval Department: Ministry of Chemical Industry of the People's Republic of China Implementation Date: May 1, 2000
National Chemical Engineering Construction Standard Editing Center (formerly Engineering Construction Standard Editing Center of the Ministry of Chemical Industry) 2001 Beijing
According to the arrangement of the Infrastructure Department of the Ministry of Chemical Industry, the Chemical Process Piping Design Technology Center of the Ministry of Chemical Industry organized the compilation of "Chemical Pipeline Filter" (HGJ532-91) (now renamed 21637-1991) as a ministerial industry standard guiding the design and manufacture of process piping.
This standard has two series: metric and imperial. The metric series has three pressure levels: 1.0, 2.5, and 4.0 MPa; the imperial series has two pressure levels: 150 and 300 pounds. Each series has eight structural types, including Y-type, positive baffle T-type, reverse baffle T-type, direct flow T-type, pointed cone type, flat cone type, double simple tank type, and multi-cylinder tank type, and four connection methods, including threaded connection, socket welding connection, butt welding connection, and flange connection. The content includes: general principles, scope of application, classification, structural dimensions, dimensional tolerances, markings, technical conditions, selection principles, ordering details, etc. This standard was compiled by the Sixth Design Institute of the Ministry of Chemical Industry. The editor-in-chief is Chen Kedong, and the participating personnel include Ma Yue, Liu Zongping, Xu Xiangju, Zhang Jiasheng, Han Gang, Tong Jianzhong, Wang Jianhua, Li Yongai, Chu Jianhua, Li Shemin, etc., and finally approved by Feng Shuyuan and Xia Dekai of the Chemical Process Piping Design Technology Center of the Ministry of Chemical Industry. During the implementation of this standard, if any amendment or supplement is found, please provide your opinions and relevant information to the Chemical Process Piping Design Technology Center of the Ministry of Chemical Industry for reference in future revisions. Chemical Process Piping Design Technology Center of the Ministry of Chemical Industry November 1991
Scope of application
Structural dimensions
Dimensional tolerances
Technical conditions
Selection principles
Ordering details
(1)
(3)
(55)
(56)
(57)
(59)
(63)
1.1 The filters listed in this standard are suitable for filtering solid impurities from liquid and gas materials in the production of chemical, petrochemical, light industry, etc. They are usually installed on the pipes before the inlet of pumps and compressors or flow meters to protect such equipment or meters.
1.2 This standard includes two series, metric and imperial. The metric series has three pressure levels: 1.0, 2.5, 4.0 MPa; the imperial series has two pressure levels: 150, 300 Lb (2.0, 5.0 MPa). The pressure level of the tip and top cone filters in the metric series starts from 0.6 MPa, i.e. 0.6, 1.0, 2.5 MPa1.3 The main structural materials of the filters in this standard are cast iron, carbon steel, low alloy steel and austenitic stainless steel. The operating temperature range is: cast iron is -20300℃: carbon steel is -20～400℃: low alloy steel is -40～400℃; stainless steel is -196400℃.
2·Scope of application
2.1 Nominal diameter
15~600mm（/\~24\）
2.2 Working temperature
-196~400℃
2.3 Working pressure
Metric series: ≤4.0MPa
British series: ≤4.64MPa
When the working temperature is >200℃, the filter should be selected according to the corresponding relationship between working pressure and working temperature. The maximum working pressure at different working temperatures is shown in Table 1 and Table 2. 7
Nominal pressure
Cast iron filter
Crushed steel filter
Low alloy steel filter
Stainless steel filter
Correspondence between working temperature and working pressure of metric series filter
Force level
Carbon steel filter
Low alloy steel filter
Stainless steel filter
2.4 Working medium
Correspondence between working temperature and working pressure of British series filter
Main applicable materials are:
Weakly corrosive materials in chemical and petrochemical production. Such as: water, ammonia, oil, hydrocarbons, etc. 400
Corrosive materials in chemical production. 400
Caustic soda, soda ash, concentrated and dilute sulfuric acid, nitric acid, acetic acid, fatty acids, etc. Low temperature materials in refrigeration and air separation production. Such as: liquid methane, liquid nitrogen, liquid oxygen and various refrigerants. Materials with hygienic requirements in light food and pharmaceutical production. Such as beer, beverages, dairy products, syrups, medical supplies, etc.
Generally, the material of the filter should be selected according to the corrosion of the medium to the material. 2.5 Interceptable solid particle diameter
This standard filter uses 30 mesh/inch stainless steel wire mesh as the standard mesh, which can intercept solid particles with a particle size of ≥614um.
3 Classification
This standard has eight structural types of filters, and their models, diameters and operating temperature ranges are shown in Tables 3 and 4. The coding method of the code and model in the table is specified in the marking in Chapter 6. 3
00g~0s
000~961
00r~09
000961
007961
008~09
o0r~96r-
00F~981-00r~09
00%~0-| |tt||00~0%-
000~0r-
fo0r~os
00%~0t-
00f~09
000~0%-
000~981-000~05
0 O0H-SS000-
00r~09
00961-
00%~00
00+~961-
00+~961-
000~0s
002~961-
007~961-
00f ~961-
000961
00~981-www.bzxz.net
00~0%-
00%~0%
000~09
000~09
007~09
00~02-
009~05
009~00
009~00
009~00
009~0s|| tt | ||00 ~ 961 | | tt |
00~961-
Q0t961-
Jasrv-sezts
00%~0%-
00P~261-
21~29700
00r~961- 01~z[9105T
.00~0618~z/1 7100s
000~961-
000~061
00r~0%
1~z7008
1~7008
000~0z—
110000r-s
1700800008
000~02-
00C000
~970S7
00~02-
00~961
C07~961-
005~961-
000~61
00~ 987
0r~961
000001
005961
9'1o91
o0p~0r
oor~or-|| tt||00p~0P
00~0%-
00~0%-
oos-Wras
000~02-
00~ 00-
00%~07-
4Structural dimensions
4.1 Cast Y-type threaded connection (SY11)
(1) Metric series
SY11C-H1.0 (shell Body material, HT250) Gold
Installation size, mm
ZG Saint"
(2) British series
SY11C-A150 (shell material: ZG230-450) Nominal diameter DN
NPT hand"
NPT1+'
Installation ruler
NPT"
Effective filter area
Effective filter area
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