This standard specifies the definition, model, code, technical requirements, test methods, marking, packaging and other aspects of pressure regulators used in urban gas transmission and distribution systems. This standard applies to pressure regulators that adjust the rear pressure, not to pressure regulators that adjust the front pressure. All pressure values ​​mentioned in this standard that are not marked refer to gauge pressure. GB 16802-1997 Urban Gas Pressure Regulator GB16802-1997 Standard download decompression password: www.bzxz.net

—1997
GB 16802
This standard is the first national standard. Foreword
This standard is proposed by the Ministry of Construction of the People's Republic of China. Introduction
This standard is under the jurisdiction of the China Municipal Engineering North China Design Institute, the technical unit of the Ministry of Construction. The drafting units of this standard are: China Municipal Engineering North China Design Institute, Shanghai Gas Company. The main drafters of this standard are: Liu Shuzhen, Zhu Gongze, Zheng Antao, Long Shushan, Chang Shuying, Su Xichen, Deng Yonglu, Wu Wenqiong, Qu Qingtao. This standard is entrusted to China Municipal Engineering North China Design Institute for interpretation. 778
1 Scope
National Standard of the People's Republic of China
Town gas pressure regulators
Town gas pressure regulatorsGB 16802-1997
This standard specifies the definition, model, code, technical requirements, test methods, marking, packaging and other aspects of the pressure regulators (hereinafter referred to as pressure regulators) used in town gas transmission and distribution systems. This standard applies to pressure regulators that regulate the back pressure, but not to pressure regulators that regulate the front pressure. Its medium is town gas (except bottled liquefied petroleum gas) with an inlet pressure not exceeding 1.6MPa, and the operating ambient temperature is -20~50℃, which should be higher than the dew point temperature of the gas. The pressure values ​​mentioned in this standard that are not marked refer to gauge pressure. 2 Referenced standards
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 the parties using this standard should explore the possibility of using the latest versions of the following standards. GB193-81 Ordinary thread diameter and pitch series (diameter 1 ~ 600mm), ordinary thread basic size (diameter 1 ~ 600mm) GB 196-81
GB 197---81
Ordinary thread tolerance and fit (diameter 1 ~ 355mm) GB 977--84
Gray cast iron mechanical properties test method
Plastic mechanical properties test method general
GB/T 1039-92
Stainless steel bar
GB 1220---92
GB1222-84Spring steel
GB 1239.4-89
GB 1239. 5-89
GB 1527-
GB 2828—87
Technical conditions for hot-rolled cylindrical helical springs
Sampling inspection of cylindrical helical springs
Drawn copper tubes
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) GB 4216. 4--
GB 4216. 5--84
10 bar grey cast iron pipe flange dimensions
16 bar grey cast iron pipe flange dimensions
GB 4216. 10—84
GB 9119. 3--88
Technical requirements for grey cast iron pipe flanges and gaskets
PN1.0MPa (10bar) flat plate type flat welded steel pipe flangePN1.6MPa (16bar) flat plate type flat welded steel pipe flangeGB 9119. 4—881
GB 9119. 8--88
PN1.6MPa(16bar) raised plate type flat welding steel pipe flangeGB9119.9--88PN2.5MPa(25bar) raised plate type flat welding steel pipe flangeGB 11352---89
Casting carbon steel parts for general engineering
Quality inspection of metal coatings and chemical coveringsCB 744—83
JB/Z 88—75
JB/Z 90--75
Plating of tropical electrical products
Painting of tropical electrical products
Approved by the State Bureau of Technical Supervision on May 28, 1997 and implemented on December 1, 1997
3 Definitions
This standard adopts the following definitions.
3.1 Pressure regulatorsGB 16802-1997
A pressure reducing device that automatically adjusts the gas outlet pressure to stabilize it within a certain pressure range. 3.2 Pressure regulators of direct effect wayThe force felt by the sensitive element is used to directly drive the regulating mechanism. 3.3 Pressure regulators of indirect effect wayThe sensitive element and the force-bearing element of the regulating mechanism are separated, and the force received by the sensitive element is amplified through the intermediate link until it is sufficient to drive the regulating mechanism to operate.
3.4 ​​Pilot regulaton
In an indirect acting pressure regulator, an auxiliary regulating device used to achieve automatic regulation. 3.5 Inlet pressure P
The pressure value measured at the inlet of the pressure regulator according to the prescribed pressure measurement method. 3.6 Outlet pressure P2The pressure value measured at the outlet of the pressure regulator according to the prescribed pressure measurement method. 3.7 Maximum inlet pressure max inlet pressure Pima The highest inlet pressure allowed within the specified pressure range. 3.8 Minimum inlet pressure min inlet pressure Pimin The lowest inlet pressure value allowed within the specified pressure range. 3.9 Maximum outlet pressure max outlet pressurePza The highest outlet pressure allowed within the specified pressure stability accuracy range. 3.10 Minimum outlet pressure min outlet pressure P2min The lowest outlet pressure value allowed within the specified pressure stability accuracy range. 3.11 Rated outlet pressure nominal outlet pressure P2n A selected value of the outlet pressure of the pressure regulator within the specified range. 3. 12 Accuracy of pressure stability P2 The ratio of the deviation of the outlet pressure of the pressure regulator from the rated value to the rated outlet pressure. 3.13 Shutdown pressure shutoff pressurePb The stable pressure value reached on the output side when the flow rate of the pressure regulator gradually decreases and its flow rate is equal to zero. 3. 14 Nominal flow rate Qn is the flow rate when the inlet pressure is Pmin and the outlet pressure is within the lower limit of the pressure stabilization accuracy range within the specified inlet pressure range. 3.15 Static characteristic curve is the curve of the relationship between P and flow when P is fixed at a certain value within the specified P range. 3. 16 Pressure difference △P is the difference between the two corresponding P2 values ​​obtained under the same P pressure during the process of increasing and decreasing within the specified P range when the flow is constant.
3.17 Total flow coefficient of pressure regulator K is the flow coefficient under the rated flow condition. 4 Model compilation and basic design parameters
4.1 The model compilation of the regulator should include the following contents: 4.1.1 The Chinese phonetic prefix RTJ or RTZ is used to represent the pressure regulator781
4.1.2 Composition and meaning of the pressure regulator product model: GB 16802-1997
4.1.2.1 The first and second digits in the model spectrum represent "gas pressure regulator", the third digit represents "working principle", the fourth digit represents "inlet pressure level system", the fifth digit represents "outlet pressure level system", the sixth digit represents "nominal pipe diameter", the seventh digit represents "connection method", and the eighth digit represents "improved model" Example:
4. 1. 2. 2
21/150
The product model is divided into two sections, separated by "_". The pressure level system should be determined according to the range specified in Table 1. Model
-Improved model
-Connection method
-Nominal pipe diameter, mm
Outlet pressure level code
-Inlet pressure level code
Working principle
-Gas pressure regulator
Basic design parameters of pressure regulator
Name and representative symbol
Inlet pressure P
Outlet pressure Pbzxz.net
Outlet pressure level code
Pressure stabilization accuracy aP:
Rated outlet pressure P
Close pressure P:
Artificial gas
Natural gas
Liquefied gas
Artificial gas
Natural gas
Liquefied gas
0. 005
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