HG/T 2129.29-1991 Chemical equipment parts made of acid-resistant phenolic plastics, slip-on flanges HG/T2129.29-1991 Standard download decompression password: www.bzxz.net

Scope of application
Chemical Industry Standard of the People's Republic of China
Acid-resistant phenolic plastic chemical equipment parts slip-on flanges
HG / T.2129.29 91
This standard applies to slip-on flanges for chemical equipment and pipelines made of acid-resistant phenolic plastic with an allowable temperature of -30°C to 130°C and an allowable pressure as specified in the table below.
2 Reference standards
GB1804 Tolerances and fits Limit deviations of dimensions without tolerances GB3274 Hot-rolled thick plates and strips of carbon structural steel and low-alloy structural steel GB9439 Grey cast iron parts
3 Types and basic dimensions
Types and basic dimensions are as specified in the following figure, Table 1 and Table 2. Approved by the Ministry of Chemical Industry of the People's Republic of China on August 19, 1991 62
[992-01-01 implementation
Split ring
Circulating ring
HG / T 2129. 29 -- 91wwW.bzxz.Net
Parts list
See this dimension table
A efficiency diagram
Nominal diameter
(1100)
12181 221
13181321
HG / T 2129. 29 — 91
11851230
1 28311
1 355[1 385
Basic size table
Allowable pressure at room temperature
MPa(kg f/cr)
0. 50 (5)
0. 15 (1. 5)
0. 13 (1. 3)
0. 10 (1. 0)
The bolt length is determined by the gasket thickness -5mm (nominal diameter is less than or equal to 300mm): =10mm (nominal diameter is greater than 300mm). Quality inspection of flange raw materials and products
Steel plates shall be in accordance with the provisions of GB3274: for split ring materials and castings, they shall be in accordance with the relevant provisions of GB.9439. The products are not allowed to have defects that reduce strength, affect connection reliability and damage product appearance, such as cracks, pores, sand inclusions, burrs, etc.
Non-matching dimension tolerance grade of metal parts: machined surface according to GB1804ET14: non-machined surface according to IT16. The limit deviation of the center circle diameter of the flange bolt hole and the chord length of two adjacent bolt holes is ±0.6mm, and the limit deviation of the chord length of any two bolt holes is in accordance with the provisions of Table 3.
Nominal diameter, DN
Limit deviation
5 Marking example
The marking symbol of the slip-on flange with nominal diameter DN=500mm is: 600～1 200
Flange DN500HG/T2129.29-91
Additional instructions:
HG/T 2129. 29 — 91
This standard is proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the National Technical Committee for Standardization of Non-metallic Chemical Equipment. This standard was drafted by Chengdu Chemical Research and Design Institute at its own expense. The main drafters of this standard are He Jiabing and He Jin.
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