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Position: Chinese Standard in English/HJ/T 252-2006
HJ/T 252-2006   Specifications for environmental protection product -- Middle and fine bubble diffusers (English Version)
Standard No.: HJ/T 252-2006 Status:valid remind me the status change

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Language:English File Format:PDF
Word Count: 3000 words Price(USD):194.0 remind me the price change

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Implemented on:2006-6-1 Delivery: via email in 1 business day
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Standard No.: HJ/T 252-2006
English Name: Specifications for environmental protection product -- Middle and fine bubble diffusers
Chinese Name: 环境保护产品技术要求 中、微孔曝气器
Chinese Classification: J88    Environmental protection equipment
Professional Classification: HJ    Professional Standard - Environment
ICS Classification: 13.030.40 13.030.40    Installations and equipment for waste disposal and treatment 13.030.40
Issued by: State Environmental Protection Administration
Issued on: 2006-4-13
Implemented on: 2006-6-1
Status: valid
Language: English
File Format: PDF
Word Count: 3000 words
Price(USD): 194.0
Delivery: via email in 1 business day
1 Scope This standard specifies the classification and designation, requirements, test methods, inspection rules, marking, packaging, transportation and storage of middle and fine bubble diffusers. This standard is applicable to the middle and fine bubble diffusers (hereafter referred to as diffusers) for biological sewage treatment and is also applicable to the diffusers for other purposes, such as transferring oxygen to the eutrophic water body and aquiculture water body in the environment. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending errors in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies. GB/T 699 Quality Carbon Structural Steels - Technical Specification GB/T 1220 Stainless Steel Bars GB 3452.1 Fluid Systems - Sealing Devices - O-rings - Inside Diameters, Cross-sections, Tolerances and Size Identification Code GB/T 3672-1992 Dimensional Tolerances for Moulded Extruded and Calendered Solid Rubber Products GB/T 5836.1 Unplasticized Polyvinyl Chloride Pipes for Drainage in Buildings GB/T 5836.2 Unplasticized Polyvinyl Chloride Pipes for Drainage in Buildings GB/T 9476 Plastic Coated Pipe GB/T 13306 Plates CJ/T 3015.1-1993 Fine Bubble Aerator for Wastewater Treatment CJ/T 3015.2-1993 Oxygen Transfer Measurement of Aerators in Clean Water CJ/T 3015.4-1996 Openable Middle and Fine Bubble Diffuser for Wastewater Treatment 3 Terms and Definitions For the purpose of this standard, the following terms and definitions apply. 3.1 Standard ventilation flow Volume of the air transferred by each diffuser to the clear water in unit time under standard condition (20℃, 101.325kPa) and test condition (service area: 0.5m2, aeration depth: 4m), m3/h. 3.2 Maximum bubble diameter The equivalent diameter of the largest capillary channel measured when the test gas appears the first bubble on the specimen surface through the specimen immerged into test liquid. 3.3 Porosity Percentage of volume of open pore (connected with atmosphere) on diffuser plate in its total volume.
Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification and Designation 5 Requirements 6 Test Method 7 Inspection Rules 8 Marking, Packaging, Transportation and Storage Appendix A (Normative) Oxygen Transfer Calculation of Diffuser in Clean Water
Referred in HJ/T 252-2006:
*GB/T 699-2015 Quality carbon structural steels
*GB/T 1220-2007 Stainless steel bars
*GB 3452.1-1992 Fluid systems--Sealing devices--O-rings--Insid diameters,cross-sections,tolerances and size identificaton code
*GB/T 3672-1992 Dimensional tolerances for moulded extruded and calendered solid rubber products
*GB/T 5836.1-2018 Unplasticized poly(vinyl chloride)(PVC-U)pipes for soil and waste discharge inside buildings
*GB/T 5836.2-2018 Unplasticized poly(vinyl chloride)(PVC-U) fittings for soil and waste discharge inside buildings
*GBT9476-
*GB/T 13306-2011 Plate
*CJ/T 3015.1-1993 Fine bubble aerator for wastewater treatment
*CJ/T 3015.2-1993 Oxygen transfer measurement of aerators in clean water
*CJ/T 3015.4-1996 Openable middle and fine bubble diffuser for wastewater treatment
Code of China
Standard
HJ/T 252-2006  Specifications for environmental protection product -- Middle and fine bubble diffusers (English Version)
Standard No.HJ/T 252-2006
Statusvalid
LanguageEnglish
File FormatPDF
Word Count3000 words
Price(USD)194.0
Implemented on2006-6-1
Deliveryvia email in 1 business day
Detail of HJ/T 252-2006
Standard No.
HJ/T 252-2006
English Name
Specifications for environmental protection product -- Middle and fine bubble diffusers
Chinese Name
环境保护产品技术要求 中、微孔曝气器
Chinese Classification
J88
Professional Classification
HJ
ICS Classification
Issued by
State Environmental Protection Administration
Issued on
2006-4-13
Implemented on
2006-6-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
3000 words
Price(USD)
194.0
Keywords
HJ/T 252-2006, HJ 252-2006, HJT 252-2006, HJ/T252-2006, HJ/T 252, HJ/T252, HJ252-2006, HJ 252, HJ252, HJT252-2006, HJT 252, HJT252
Introduction of HJ/T 252-2006
1 Scope This standard specifies the classification and designation, requirements, test methods, inspection rules, marking, packaging, transportation and storage of middle and fine bubble diffusers. This standard is applicable to the middle and fine bubble diffusers (hereafter referred to as diffusers) for biological sewage treatment and is also applicable to the diffusers for other purposes, such as transferring oxygen to the eutrophic water body and aquiculture water body in the environment. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending errors in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies. GB/T 699 Quality Carbon Structural Steels - Technical Specification GB/T 1220 Stainless Steel Bars GB 3452.1 Fluid Systems - Sealing Devices - O-rings - Inside Diameters, Cross-sections, Tolerances and Size Identification Code GB/T 3672-1992 Dimensional Tolerances for Moulded Extruded and Calendered Solid Rubber Products GB/T 5836.1 Unplasticized Polyvinyl Chloride Pipes for Drainage in Buildings GB/T 5836.2 Unplasticized Polyvinyl Chloride Pipes for Drainage in Buildings GB/T 9476 Plastic Coated Pipe GB/T 13306 Plates CJ/T 3015.1-1993 Fine Bubble Aerator for Wastewater Treatment CJ/T 3015.2-1993 Oxygen Transfer Measurement of Aerators in Clean Water CJ/T 3015.4-1996 Openable Middle and Fine Bubble Diffuser for Wastewater Treatment 3 Terms and Definitions For the purpose of this standard, the following terms and definitions apply. 3.1 Standard ventilation flow Volume of the air transferred by each diffuser to the clear water in unit time under standard condition (20℃, 101.325kPa) and test condition (service area: 0.5m2, aeration depth: 4m), m3/h. 3.2 Maximum bubble diameter The equivalent diameter of the largest capillary channel measured when the test gas appears the first bubble on the specimen surface through the specimen immerged into test liquid. 3.3 Porosity Percentage of volume of open pore (connected with atmosphere) on diffuser plate in its total volume.
Contents of HJ/T 252-2006
Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification and Designation 5 Requirements 6 Test Method 7 Inspection Rules 8 Marking, Packaging, Transportation and Storage Appendix A (Normative) Oxygen Transfer Calculation of Diffuser in Clean Water
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Keywords:
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