GB14374-1993
Discharge standard of water pollutants for space propellant
航天推进剂水污染物排放标准
GB 14374-1993 is a current mandatory Chinese national standard for Discharge standard of water pollutants for space propellant. It appears in the Chemicals compliance cluster with a product safety focus and has an implementation date of Dec 1, 1993.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to the wastewater discharge management of space propellants used in aerospace operations, as well as the environmental impact assessment, design, and竣工验收 (completion acceptance) of related construction projects. It is also applicable to facilities utilizing hydrazine-based and amine-based fuels. It regulates discharges into specific water bodies categorized under GB 3838 and GB 3097.
Technical requirements
The standard establishes maximum allowable discharge concentrations for water pollutants originating from aerospace propellant operations. It categorizes the limits based on the project initiation date, creating distinct compliance tiers for facilities approved before and after December 1, 1993. Facilities commissioned after this date are subject to stricter environmental limits. Key regulated parameters include general wastewater indicators such as pH value, Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (CODcr), suspended solids, and ammonia nitrogen. The standard also sets strict concentration thresholds for specific toxic propellant components, including formaldehyde, aniline compounds, hydrazine, monomethylhydrazine, unsymmetrical dimethylhydrazine, triethylamine, and diethylenetriamine. The regulatory framework dictates that pollutants must not be discharged into Class IV and Class V waters as defined in GB 3838, or Class III marine waters as defined in GB 3097. Compliance is verified based on the maximum value obtained from a single monitoring event.
Testing methods
Monitoring involves specific sampling protocols where propellant-specific pollutants (like hydrazines and amines) are sampled at the workshop or treatment facility outlet, while general pollutants are sampled at the main discharge outlet. The standard references a series of standardized testing methods, primarily utilizing spectrophotometry and titrimetric methods referenced in GB 6920, GB 7488, and GB 11914, to evaluate the precise concentration of each regulated pollutant.
FAQs
What products and facilities are regulated under GB 14374-93?
This standard regulates the discharge of water pollutants from facilities using space propellants. It specifically applies to units utilizing hydrazine-based and amine-based fuels, covering wastewater management, environmental impact assessments, and post-construction discharge management.
How does GB 14374-93 differentiate between existing and new facilities?
The standard establishes two distinct compliance tiers based on the project initiation date. Facilities approved before December 1, 1993, follow the baseline limits, while those approved on or after this date must adhere to stricter concentration limits for pollutants like BOD, COD, and ammonia nitrogen.
What are the specific monitoring and sampling requirements under this standard?
The standard mandates specific sampling points and frequencies. For highly toxic propellants like hydrazine and dimethylhydrazine, samples must be collected at the workshop or treatment facility outlet. Sampling frequency is determined by the production cycle, occurring every 2 hours for cycles under 8 hours, and every 4 hours for longer cycles.
The summary above provides a high-level overview of GB 14374-93. To ensure complete compliance for your aerospace or chemical manufacturing facilities entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 14374-93 today to access all detailed parameter tables, exact concentration limits, and comprehensive testing procedures.
Applicability hints
- Type
- Environmental protection
- CCS
- Z62
- ICS
- 13.040.50
- Competent department
- Ministry of Ecology and Environment
- Technical committee
- Ministry of Ecology and Environment