HG/T 2129.27-1991 Expansion joints for chemical equipment parts made of acid-resistant phenolic plastics

HG/T 2129.27-1991 Expansion joints for chemical equipment parts made of acid-resistant phenolic plastics HG/T2129.27-1991 Standard download decompression password: www.bzxz.net

Scope of application
Chemical Industry Standard of the People's Republic of China
Expansion joints for chemical equipment parts made of acid-resistant phenolic plastic
HG/T2129.27-—91
This standard applies to expansion joints for acid-resistant phenolic plastic pipes with an allowable temperature of -30℃～130℃ and an allowable pressure as specified in the table below. 2 Reference standards
GB1804 Tolerances and fits, limit deviations of dimensions without tolerances HG/T2128 Technical conditions for chemical equipment, pipes and fittings made of acid-resistant phenolic plastic 3 Types and basic dimensions
Types and basic dimensions are as specified in the figure below and Tables 1 and 2. Approved by the Ministry of Chemical Industry of the People's Republic of China on August 19, 1991 and implemented on January 1, 1992
Nominal diameter
Tianjin Shrinkage
Expansion pipe
HG/T2129.27-91www.bzxz.net
Parts list
See basic dimension table
See basic dimension table
4 Quality inspection, packaging, storage and transportation of raw materials and productsBasic dimension table
Acid-resistant phenolic plastics
Asbestos rope
Acid-resistant phenolic plastics
The quality inspection, packaging, storage and transportation of raw materials and products shall conform to the provisions of HG/T2128. Mass
Allowable pressure at room temperature
MPa(kgf/cm)
0. 30 (3)
0. 20 (2)
0.15 (1.5)
0. 13 (1.3)
The flange shall not have cracks or other defects that reduce the flange strength or affect the connection reliability. The allowable deviation of the center circle diameter of the flange bolt hole and the chord length between two adjacent bolt holes is ±0.6mm; the deviation of the chord length between any two bolt holes is ±1mm. The non-matching dimension tolerance grade of metal parts is GB1804IT14 for machined surfaces and IT16.5 for non-machined surfaces. Marking example
The expansion joint made of acid-resistant phenolic plastic with a nominal diameter DV=200mm is marked as: expansion joint DN200 HG/T2129.27--91
Additional instructions:
HG/T2129.27
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, and the main drafters of this standard are He Jiabing and He Jin. 91
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