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BS EN ISO 10715:2022 – TC

BS EN ISO 10715:2022 – TC

$280.87

Tracked Changes. Natural gas. Gas sampling

Published By Publication Date Number of Pages
BSI 2022 206
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This document gives means for ensuring that samples of natural gas and natural gas substitutes that are conveyed into transmission and distribution grids are representative of the mass to which they are allocated. NOTE      To ensure that a particular gas is taken into account in the standard, please see Annex A. This document is applicable for sampling at sites and locations where interchangeability criteria, energy content and network entry conditions are measured and monitored and is particularly relevant at cross border and fiscal measurement stations. It serves as an important source for control applications in natural gas processing and the measurement of trace components. This document is applicable to natural dry gas (single phase – typically gas transiting through natural gas pipelines) sampling only. On occasion a natural gas flow can have entrained liquid hydrocarbons. Attempting to sample a wet natural gas flow introduces the possibility of extra unspecified uncertainties in the resulting flow composition analysis. Sampling a wet gas (two or three phases) flow is outside the scope of this document. This document does not apply to the safety issues associated with gas sampling.

PDF Catalog

PDF Pages PDF Title
1 30466106
123 A-30397799
124 undefined
126 European foreword
Endorsement notice
130 Foreword
131 Introduction
133 1 Scope
2 Normative references
3 Terms and definitions
136 4 Safety considerations
5 Principles of sampling
6 The concept of representative sample
137 7 Types of sampling
7.1 Sampling method considerations
138 7.2 Spot sampling
7.2.1 General
7.2.2 Fill-and-empty method
139 7.2.3 Controlled-rate method
7.2.4 Evacuated-cylinder method
7.2.5 Helium pre-fill method
7.2.6 Floating-piston cylinder method
7.2.7 Single cavity sample cylinder
7.2.8 Sampling frequency
141 7.3 Incremental sampling (continuous or composite)
7.3.1 General considerations
7.3.2 Intervals
7.3.3 System considerations
142 7.3.4 Monitoring the filling process
7.3.5 Cylinder tracking
7.3.6 Overpressure protection
7.4 Online or direct sampling
7.4.1 General considerations
144 7.4.2 Automatic drainage
7.4.3 Reducing the pressure
145 7.4.4 Inert-gas purging
7.4.5 Safety/pressure relief valve
7.4.6 Heating of sample line
8 Sampling location
8.1 General
8.2 Sampling place
8.2.1 General
146 8.2.2 Relevant gas
8.2.3 Undisturbed gas
8.2.4 Access
147 8.3 Sampling position
8.4 Sampling point
148 9 Ideal implementation of gas sampling
9.1 General
9.2 Gas sorption
9.2.1 General
149 9.2.2 Surface treatment
9.2.3 Sorption considerations regarding sampling equipment
9.2.4 Equilibrating of sampling equipment
150 9.3 Materials used in sampling
9.3.1 General considerations
151 9.3.2 Steel grades
9.3.3 Epoxy coatings
9.3.4 Other polymers
9.3.5 Rubbers
9.3.6 Bimetallic corrosion
9.4 Sample contamination
9.4.1 Cleanliness
9.4.2 Cleaning sampling systems
152 9.4.3 Pre-charging of sample cylinders
9.5 Sample condensation
9.5.1 Temperature
9.5.2 Pressure reduction and Joule Thomson cooling
154 9.5.3 Condensation and revaporization
156 9.6 Disturbance of the flow through the sampling system
9.7 Delay time
9.7.1 Direct sampling method
157 9.7.2 Indirect sampling method
158 10 Sampling equipment
10.1 General
159 10.2 Probes
10.2.1 General
10.2.2 Straight-tube probe
160 10.2.3 Probe regulator
161 10.2.4 Pitot probe
162 10.3 Tubings
10.3.1 Sampling and sample lines
163 10.3.2 Bypass constructions
10.4 Filters, membranes and separators
164 10.5 Valves and safety valves
165 10.6 Fittings
10.7 Flow monitoring and control
10.8 Pressure reducers
10.9 Pressure sensor/manometers
10.10 Heating devices
166 10.11 Seals and lubricants
10.12 Sample containers or cylinders
10.12.1 General
167 10.12.2 Standard or single cavity cylinder
10.12.3 Floating-piston cylinders or Constant Pressure cylinders
168 10.13 Concentration devices
169 10.14 Number and sequence of equipment
170 11 Verification of the system
171 12 Troubleshooting
173 Annex A (informative) Purposes of sampling, panel of compounds and information in the sampling report
174 Annex B (informative) Procedures for sampling
181 Annex C (informative) Gas sorption effect: adsorption/desorption
182 Annex D (informative) Cleaning of steel sampling cylinders
183 Annex E (informative) Joule-Thomson cooling and phase behaviour
186 Annex F (informative) Vortex shedding and associated problems
190 Annex G (informative) Guidelines for the calculation of the residence time
198 Annex H (informative) Protocol for gas sampling system verification
200 Annex I (informative) Number of samples
202 Bibliography

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BS EN ISO 10715:2022 - TC
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