T/CMA SB 003-2009
TUANTI · 2009-11-20

Guidelines for selection of flow parameters for drinking cold water meters and hot water meters for measuring water flow in closed full pipes

ICS 21.010

1Key Takeaways

This standard applies to applications where the maximum allowable working pressure (MAP) is greater than or equal to 1MPa (0.6MPa for water meters with pipe nominal diameter DN ≥ 500mm), the maximum allowable working temperature (MAT) for drinking cold water meters is 30°C, and hot water meters can Various types of wat…

2Expert Interpretation

An in-depth interpretation of the China Metrology Association's TCMA-SB 003:2009 standard, covering the flow parameter selection rules, measurement characteristic requirements, error tolerance and implementation points for cold water/hot water meters in closed pipes, and providing parameter comparison tables for five types of water meters, including rotary-wing and propeller-wing types.

Standard background and scope of application

This standard was formulated based on the GB/T 778 series of national standards and the JJG 162-2009 verification procedures. It was first published in November 2009 and is applicable to the selection of flow parameters for drinking cold water meters (MAT≤30℃) and hot water meters (MAT≤90℃).

Core measurement requirements

Parameter typeSelection basisTypical value example
Common flow rate Q3GB/T 321 R5 series1.6, 2.5, 4, 6.3, 10, 16, 25m³/h
Q3/Q1 ratioGB/T 321 R10 series50, 63, 80, 100, 160
Overload flow Q4Q4≥1.25Q3-

Error control system

Low zone error (Q1≤Q＜Q2): ±5%
High zone error (Q2≤Q≤Q4): cold water meter ±2%, hot water meter ±3%

Note: Boundary flow Q2=Q3/10 (when Q3/Q1＞5)

Comparison of parameters of five types of water meters

Water meter typeTypical diameter(mm)Commonly selected Q3(m³/h)Q3/Q1
Rotor wet type15-502.5-2580
Horizontal propeller type50-80040-630050

Implementation suggestions

  1. Give priority to the standard recommendedCommonly selected value combination
  2. DN≤50mm water meter should ensure Q3/Q1≥50
  3. Hot water meter needs to pay special attention to the effect of temperature on error

3Version History

T/CMA SB 003-2009 2009-11-20

4Standard Metadata

Standard Number
T/CMA SB 003-2009
Status
Current (70% confidence)
Publisher
Group Standards of the People's Republic of China
Publication Date
2009-11-20
Implementation
2017-07-31
ICS Classification
21.010 

5Citation Network

0
Cite this standard
4
Referenced herein
Referenced by T/CMA SB 003-2009
GB/T 321-2005 GB/T 778.1-2007 GB/T 778.3-2007 JJG 162-2009

6Frequently Asked Questions

What is T/CMA SB 003-2009?
T/CMA SB 003-2009 — Guidelines for selection of flow parameters for drinking cold water meters and hot water meters for measuring water flow in closed full pipes is an international standard developed by Group Standards of the People's Republic of China. This standard applies to applications where the maximum allowable working pressure (MAP) is greater than or equal to 1MPa (0.6MPa for water meters with pipe nominal diameter DN ≥ 500mm), the maximum allowable working temperature (MAT) for drinking...
What does T/CMA SB 003-2009 cover?
This standard covers: This standard applies to applications where the maximum allowable working pressure (MAP) is greater than or equal to 1MPa (0.6MPa for water meters with pipe nominal diameter DN ≥ 500mm), the maximum allowable working temperature (MAT) for drinking cold water meters is 30°C, and hot water meters can...
Who should use this standard?
This standard is intended for organizations, professionals, and stakeholders involved in various industries and sectors. It is applicable to manufacturers, service providers, regulatory bodies, and certification organizations.
What is the latest version of T/CMA SB 003-2009?
The current published version is T/CMA SB 003-2009, published on 2009-11-20. Always check for amendments or pending revisions.
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