HJ 2524-2012 English PDF

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HJ 2524-2012: Technical requirement for environmental protection products. Single screw pump
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
HJ 2524-2012	239	Add to Cart	3 days	Technical requirement for environmental protection products. Single screw pump	Valid

Similar standards

JB/T 6879   GB/T 7782   JB/T 6880.1   

Basic data

Standard ID: HJ 2524-2012 (HJ2524-2012)
Description (Translated English): Technical requirement for environmental protection products. Single screw pump
Sector / Industry: Environmental Protection Industry Standard
Classification of Chinese Standard: J71
Classification of International Standard: 23.080
Word Count Estimation: 9,934
Quoted Standard: GB/T 9112; GB/T 9115; GB/T 9119; GB/T 9124; GB/T 13384; GB/T 17241.6; GB/T 17241.7; JB/T 4297; JB/T 6880.1; JB/T 6880.2; JB/T 8091-1998; JB/T 8097-1999; JB/T 8098; JB/T 8644
Regulation (derived from): Department of Environmental Protection Notice No. 47 of 2012;
Issuing agency(ies): Ministry of Ecology and Environment
Summary: This standard specifies the technical requirements of a single screw, test methods, inspection rules, marking, packaging, transport and storage. This standard applies to transport media containing solid particles and fibers of single screw.

HJ 2524-2012: Technical requirement for environmental protection products. Single screw pump

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical requirement for environmental protection products.Single screw pump National Environmental Protection Standard of the People's Republic Environmental protection product technical requirements single screw pump Technical requirement for environmental protection products Single screw pump Published on.2012-7-31 2012-11-1 Implementation Ministry of Environmental Protection released

Content

Preface II 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Basic requirements 1 5 performance requirements 2 6 Test method 3 7 Inspection rules 4 8 Marking, packaging, transportation and storage 4

Foreword

In order to implement the Law of the People's Republic of China on Water Pollution Prevention and Control, standardize the production and manufacture of single screw pumps and improve the quality of single screw pumps. Develop this standard. This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of single screw pumps. This standard is the first release. This standard was formulated by the Science and Technology Standards Department of the Ministry of Environmental Protection. This standard is mainly drafted by. China Environmental Protection Industry Association (Water Pollution Control Committee), Hangzhou Xinglong Pump Co., Ltd. This standard was approved by the Ministry of Environmental Protection on July 31,.2012. This standard has been implemented since November 1,.2012. This standard is explained by the Ministry of Environmental Protection. Environmental protection product technical requirements single screw pump

1 Scope of application

This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of single screw pumps. This standard applies to the delivery of single screw pumps containing solid particles and fiber media.

2 Normative references

The terms in the following documents become the terms of this standard by reference to this standard. For undated references, the most The new version applies to this standard. GB/T 9112 Steel Pipe Flange Types and Parameters GB/T 9115.1 flat, protruding face welded steel pipe flange GB/T 9119 plate type flat welded steel pipe flange GB/T 9124 steel pipe flange technical conditions General technical conditions for GB/T 13384 mechanical and electrical product packaging GB/T 17241.6 integral cast iron flange GB/T 17241.7 Cast iron pipe flange technical conditions JB/T 4297 pump product painting technical conditions JB/T 6880.1 grey cast iron parts for pumps JB/T 6880.2 steel castings for pumps JB/T 8091-1998 Screw pump test method JB/T 8097-1999 Pump vibration measurement and evaluation method JB/T 8098 pump noise measurement and evaluation method JB/T 8644 single screw pump

3 Terms and definitions

The following terms and definitions apply to this standard. 3.1 Single screw pump Single screw pump a rigid rotor (screw) is rotated around the eccentric circle in the elastic stator (bushing) cavity, thereby continuously The pump that transports media from one end to the other.

4 basic requirements

4.1 Manufacturing 4.1.1 The single screw pump shall be manufactured in accordance with the product drawings and technical documents approved by the prescribed procedures and in accordance with the provisions of this standard. 4.1.2 The single-screw pump stator and rotor spiral surface should be accurate, the surface should not have defects, and the surface roughness should not be lower than Ra0.8 μm. 4.2 Assembly 4.2.1 The non-machined surface of the single-screw pump that is in contact with the medium to be conveyed shall be rust-proof (except stainless steel) before assembly. 4.2.2 The bearing housing and the universal joint seal sleeve shall be filled with 2/3 cavity grease. 4.2.3 The temperature rise of the bearing should not exceed the ambient temperature of 35 ° C, and its maximum temperature should not exceed 80 ° C. 4.2.4 Single screw pump shaft seals are mechanical or packing seals. Both seals should be interchangeable without replacement of the housing. Shaft seal The corresponding position of the corresponding bearing housing shall be provided with a leakage recovery device interface or a leakage drainage outlet pipe interface. Shaft seal leakage should be in accordance with JB/T Provision of 8644. 4.2.5 After the single-screw pump has been tested, the internal effluent should be removed and the rust-proof treatment should be repeated. Single screw pump metal zero (part) surface coating The paint requirements shall be in accordance with JB/T 4297. 4.3 Materials and Parts, Parts 4.3.1 The main components of the single-screw pump shall be based on the chemical and physical properties of the medium to be transported and the pressure of the pump. Make a choice. a) Zero, parts (inhalation body, discharge body, shaft seal chamber, etc.) in contact with the medium should be made of cast iron, cast steel and stainless steel; b) The shaft should be made of 45 high quality carbon steel, 40Cr alloy structural steel or stainless steel; c) The materials of the rotor and stator should be selected according to Table 1. Materials that have been tested and verified to not affect performance are also available. Material There should be a certificate of inspection. Table 1 rotor, stator material table Conveying medium stator material rotor material Pharmacy Nitrile rubber (NBR) EPDM 12Cr18Ni9 (S30210) 06Cr19Ni10 (S30408) 022Cr17Ni12Mo2 (S31603) 40Cr Send filter sludge (with less than 5% mud) Nitrile rubber (NBR) Dewatered sludge (15-20% mud) Wear-resistant rubber Cr12 Desulfurized lime slurry, desulfurized gypsum EPDM rubber 022Cr17Ni12Mo2 (S31603) 4.3.2 The cast iron and cast steel parts of the single screw pump shall comply with the provisions of JB/T 6880.1 and JB/T 6880.2 respectively. 4.3.3 Single screw pump suction and discharge flange connection size should be in accordance with the material and form, respectively, in accordance with GB/T 17241.6, GB/T Provisions of 17241.7, GB/T 9112, GB/T 9115.1, GB/T 9119 and GB/T 9124. 4.3.4 Parts and components (inhalation body, discharge body, sealed chamber) subjected to liquid pressure shall not leak. 4.3.5 The life of the single screw pump should be more than 2 years. The life of the main wearing parts of the stator and rotor should not be less than 1 year. 4.4 Conditions of use a) The temperature of the conveying medium is < 80 °C, and the operating temperature range of the special stator is -20 °C～150 °C; b) the maximum particle size does not exceed the eccentricity of the rotor, and the maximum fiber length does not exceed 0.4 times the rotor pitch; c) The maximum solid content of the medium is generally not more than 30%.

5 performance requirements

5.1 Performance 5.1.1 Single-screw pumps are classified into miniature, small, medium, large and extra large five-stage according to the flow rate. Flow tolerance of single screw pump It shall not be lower than the lower deviation specified in Table 3 of JB/T 8091-1998. The volumetric efficiency and total efficiency shall comply with the requirements of Table 2 of this standard. Table 2 Basic parameters of single screw pump Category level Theoretical flow at 100 r Volumetric efficiency (ηv) Total efficiency (η) Rated pressure at no load The first type of micro ≤10 ≥96 ≥65 ≥55 The second type is small >10, ≤50 ≥96 ≥70 ≥64 The third type of medium >50, ≤200 ≥96 ≥75 ≥68 Fourth category Large >200, ≤800 ≥96 ≥80 ≥72 Extra large >800 ≥96 ≥85 ≥76 Note. The volumetric efficiency ηv and the total efficiency η are the values of the stator and rotor relative sliding Vgm = 4 m/s. 5.1.2 Single-screw pump for.200 h reliability operation test under stator and rotor relative sliding speed Vgm= 4 m/s under specified pressure conditions After the test (the test medium is normal temperature or similar liquid), the reduction in no-load volumetric efficiency should not exceed 2%. 5.2 Vibration The vibration level of the pump is evaluated according to the categories in Table 2 of this standard and Tables 1 and 3 of JB/T 8097-1999. Pump vibration level It is not divided into four grades A, B, C, and D, and grade D is unqualified. 5.3 Stability energy Single-screw pump with rated rotor relative sliding speed Vgm= 4 m/s under rated pressure. When conveying normal temperature and clear water, the stator life shall not be allowed. Below 3 000 h, the flow rate must not exceed 20%. 5.4 Noise The noise value of a single screw pump must not exceed 76 dB(A).

6 Test methods

6.1 The temperature rise of the bearing is measured by a point contact or infrared thermometer. 6.2 The amount of shaft seal leakage shall be measured by volumetric method or gravimetric method, and the measurement time shall not be less than 5 min. 6.3 Paint quality test shall be carried out in accordance with JB/T 4297. 6.4 The hydraulic test of the parts shall be carried out at 1.5 times the working pressure, and the pressure duration shall not be less than 10 min. 6.5 The test method for the performance of the single-screw pump shall be governed by JB/T 8091-1998. Single screw pump no-load volumetric efficiency is measured flow The ratio to the theoretical flow. The measured flow rate is measured under no-load conditions with an inlet pressure of ±0.03 MPa and an outlet pressure of ≤0.05 MPa. Actual traffic. 6.6 The vibration measurement method of the single screw pump is subject to the provisions of JB/T 8097-1999. 6.7 Stability test is carried out under the requirements of 5.3. 6.8 The noise measurement method of the single screw pump is subject to the provisions of JB/T 8098.

7 Inspection rules

7.1 Inspection classification The inspection of single screw pumps is divided into factory inspection and type inspection. 7.2 Factory inspection 7.2.1 Each single screw pump shall be inspected before leaving the factory, and it shall pass the inspection and be accompanied by the product certificate before leaving the factory. 7.2.2 The factory inspection items are shown in Table 3. Table 3 Single screw pump inspection items and requirements No. Item Name Requirement Test Method Factory Inspection Type Inspection 1 Bearing temperature rise 4.2.3 6.1 √ √ 2 shaft seal leakage 4.2.4 6.2 √ √ 3 Painting quality 4.2.5 6.3 -- √ 4 Zero, component hydraulic test 4.3.4 6.4 √ √ 5 Performance 5.1 6.5 √ √ 6 Vibration 5.2 6.6 -- √ 7 Stability test 5.3 6.7 -- √ 8 noise 5.4 6.8 -- √ 7.3 Type test 7.3.1 Type inspection shall be carried out in one of the following cases. (a) New product type identification; (b) significant changes in product structure, materials or workmanship; (c) There is a large difference between the factory inspection result and the result of the last type inspection; (d) in normal production, once every two years; (e) Suspension of production for more than two years, when production resumes; 7.3.2 The type inspection items are shown in Table 3. 8 Marking, packaging, transportation and storage 8.1 mark 8.1.1 Each single screw pump shall be set with product label in obvious position. The size and technical requirements of the label shall comply with GB/T 13306. Provisions. 8.1.2 Each single screw pump shall have an obvious turning sign and a sign prohibiting dry running. 8.2 Packaging The packaging of single screw pump should meet the requirements of GB/T 13384 and ensure that the pump and parts do not rust under normal transportation conditions. Corrosion, damage and loss of accessories, spare parts and documents. 8.3 Transportation The single screw pump should be fixed firmly during transportation to avoid impact and bump. 8.4 Storage The single screw pump should be stored in a ventilated, sun-protected warehouse to avoid direct sunlight and prevent the rubber stator from aging. ......

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