JB/T 9093-1999 JB/T 9093-1999 Technical requirements for steam traps JB/T9093-1999 Standard download decompression password: www.bzxz.net

JB/T9093—1999 This standard is a revision of ZBJ16007—1999 "Technical Specifications for Steam Traps". During the revision, the preface and 6.3\ Sampling and judgment were added. This standard replaces ZBJ16007—1999 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Valve Standardization. The drafting unit of this standard is Beijing Valve Research Institute. The main drafters of this standard are Shan Wenjia, Lu Peiwen and Hong Miancheng. 1 Scope
Machinery Industry Standard of the People's Republic of China
Automatic steam traps
Technical Specification
This standard specifies the technical requirements, test methods and inspection rules for steam traps. JB/T9093 replaces ZBJ16 C079r1
This standard is applicable to mechanical, thermostatic and thermodynamic steam traps (hereinafter referred to as traps) with nominal pressure PN≤16MPa, nominal diameter DN≤100mm and medium temperature ≤100C. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. The versions shown are valid at the time of publication of this standard. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards GB150—1998 Steel pressure vessels
G3151-1989 Steel shell and tube heat exchangers
GB3/T1184-1996 Shape and position tolerances Unmarked tolerances GB/r4216.2~4216.5--1984 Grey cast iron pipe flange dimensions GB/T 9113. 1~9113.26--1988Www.bzxZ.net
GB/T 12225-1989
GB/T 12226-1989
GB/T 12227--1989
GB/T 12228---1989
GB/T 12229-- 1989||t t||GB/T12230.1989
GB/T 12247--1989
GB/T 12248--1989
GB/T 12249 -1989
GB/T 12250--1989
GB/T 12251—1989
General valve
General valve
General valve
General valve
General valve
General valve
General valve
Integral steel pipe flange
Technical conditions for copper alloy castings
Technical conditions for iron castings
Technical conditions for ductile iron castings
Technical conditions for carbon steel forgings
Technical conditions for carbon steel castings
Technical conditions for austenitic steel castings
Classification of steam traps
Steam traps
Steam traps
Steam traps
Structural length
Test methods for steam traps
JB/T 7928—-1999
General valve supply requirements
3 Terms
Terms should comply with the provisions of GB/T12248
4 Classification
Classification should comply with the provisions of GI3/T12247. Approved by the State Machinery Industry Bureau in 1999-0712
2000.01-01 implementation
5 Technical requirements
5.1 Design requirements
5.1.1 Valve body, bonnet and end connection dimensions 1999
JB/T 9093
5.1.1, 1 Reading body and flange are generally integrally cast or forged, and can also be made by socket welding and butt welding. Socket welding and butt welding should comply with the provisions of GB150 and G13151. Welders should be qualified according to the provisions of relevant departments. 5.1.1.2 The bonnet and valve body can be connected by flanges and threads. 5.1,7.3 The method of steel steam trap shall be in accordance with the provisions of GB/T9113.1~9113.26. 5.1.1.4 The flange of iron steam trap shall be in accordance with the provisions of GB/T4216.2~4216.5. 5.1.1.5 The parallelism tolerance of the flange seals at both ends of the straight-through steam trap flange connection shall be in accordance with the [0-level accuracy] specified in GB/T1181. The coaxiality tolerance of the threads at both ends of the straight-through steam trap thread connection shall be in accordance with the 11-level accuracy specified in GB/T11841. 5.1.1.6
The position tolerance of the bolt hole axis of the connecting flange relative to the theoretical correct position shall not be greater than the distance between the bolt gun and the bolt hole. 5.1.1. 7
1/4, the axial tolerance of the flanges on both sides relative to the bolt holes should not be less than 1/2 of the gap between the bolt holes and the bolt holes. 5.1.1.8 The structural length shall be in accordance with the provisions of GIB/T12250. 5.1.2 Filter
5.1.2.1 The steam trap shall be equipped with a filter, and the steam trap without a filter shall be equipped with a separate filter. 5.1.2.2 When the filter is punched from a plate, its mesh aperture shall not be greater than 1mm. 5.1.2.3 The flow area of ​​the filter shall not be less than 1.5 times the flow area of ​​the steam trap: 5 .1.2.4 The filter screen should have sufficient rigidity and its welds should be firm and reliable. 5.1.3 Internal parts
5.1.3.1 The lever, pin and other internal parts of the mechanical steam trap should ensure flexible and reliable operation, and have sufficient strength and corrosion resistance. 5.1.3.2 The driving parts of the thermostatic steam trap should have sufficient strength and should be sensitive and reliable at the highest working pressure and temperature. 5.1.3.3 The opening and closing parts of the thermodynamic steam trap should have sufficient strength and wear resistance, and should be sensitive and reliable, and should not have long resistance. 5.1.4 The water valve should have an automatic exhaust function. 5.2 Material requirements
5.2.1 Grey iron castings shall comply with the provisions of GB/T12226. 5.2.2 Carbon steel castings shall comply with the provisions of GB/T12229. 5.2.3 Carbon steel forgings shall comply with the provisions of GB/T12228. 5.2.4 Austenitic steel castings shall comply with the provisions of GB/T12230. 5.2.5 Ductile iron castings shall comply with the provisions of GB3/T12227. 5.2.6 Copper alloy castings shall comply with the provisions of GB3/T12225. 5.3 Performance requirements
5.3.1 Shell strength shall comply with the provisions of 4.1 of GB/T12251-1989. 5.3.2 Action shall comply with the provisions of 4.2 of GB/T12251--1989. 5.3.3 Minimum working pressure shall not exceed the design given value. 5.3.4 Maximum working pressure shall not be less than the design given value 5.3.5 Maximum back pressure rate:
a) Mechanical type shall not be less than 80%;
b) Thermodynamic type shall not be less than 50%, of which the pulse type shall not be less than 25%;
c) Thermostatic type shall not be less than 30%.
5.3.6 There shall be no gas blockage when removing air and other non-condensable gases. 5.3.7 The maximum and minimum subcooling degrees shall not exceed the design given values. 5.3.8 Steam leakage rate
JB/T9093
5.3.8.1 Except for pulse type and orifice type, the load steam leakage rate of the steam trap shall not be greater than 135.3.8.2 The no-load steam leakage rate of the machine-base type and thermostatic type steam trap shall not be greater than 0.5%: 5.3.9 The hot condensate discharge volume of a given subcooling degree shall not be less than ten design given values. 6 Test methods and inspection rules
6.1 Performance test methods shall be in accordance with the provisions of GB/T12251. 6.2 Inspection rules
6.2.1) Inspection
a) The delivery inspection shall be carried out one by one;
b) The factory inspection shall include shell test and action test. 6.2.2 Type inspection
6.2.2.1 Type inspection shall be carried out in any of the following circumstances:a) trial production appraisal when new products or old products are transferred to the factory for production;b) during formal production, this inspection shall be carried out periodically after regular production or accumulation of a certain amount of production;r) during formal production, when there are major changes in structure, materials, and processes that may affect product performance;d) when the product is resumed after a long period of suspension;e) when there are major differences between the factory inspection results and the last type inspection;f) when the quality supervision agency makes a type inspection request. 6.2.2.2 Type inspection shall include:
a) Shell test:
b) Action test:
c) Minimum working pressure test;
d) Maximum working pressure test;
e) Maximum back pressure test;
f) Air exhaust capacity test;
g) Maximum and minimum subcooling tests; h) Steam leakage test;
|) Hot condensate discharge test.
6.3 Sampling and judgment rules
6.3.1 The authority to inspect the products shall sample 3 units per batch and per specification (no less than 20 units per batch and per specification). 6.3.2 Each sample shall be qualified if all the items specified in 6.2.2.2 are qualified. 6.3.3 The type inspection of the product of this specification is qualified if all 3 samples are qualified. 6.3.4 If 1 unit among 3 samples is unqualified, resampling is allowed. 6.3.5 If 2 units among 3 samples are unqualified, the product of this specification is judged to be unqualified. 7 Marking
Marking shall be in accordance with the provisions of GB/T12249.
8 Supply requirements
Supply requirements shall be in accordance with the provisions of JB/T7928.
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