MH/T 6004-2015 in English

Background of Standard Revision and Technological Evolution

This standard replaces MH 6004-1996 version. The main technical upgrades include:

• The referenced standards are updated synchronously with the current national standard system
• Added technical requirements for equipment such as flow calibration device
• Establish an ABC classification management system for measuring equipment (Appendix A)
• Introduce a metrological audit system (Appendix C)

Comparison of core management frameworks

Key measurement operation specifications

Innovation in natural loss management

The standard establishes a three-dimensional loss control system for the first time:

1. Regional division: Three major climate zones: Class A (South China), Class B (North China), and Class C (Northwest China)
2. Seasonal coefficient: Differentiated loss rates in summer and autumn (April-September) and spring and winter
3. Altitude correction: >1000m areas are compensated at a coefficient of 1.21-1.76

Implementation suggestions

Measurement equipment management

• Class A equipment (such as class=instrument>Trade settlement flowmeters) must be calibrated compulsorily
• Establish a dynamic management system for electronic ledgers to ensure that the calibration cycle is controllable

Loss control optimization

• Transportation losses are calculated using the "50km segment accumulation method"
• Monthly inventory must be conducted at 24:00 when the pipeline is full