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Title: Validating Laboratory Gas Analyses
Author: Fred G. Van Orsdol
Source: 2011 International School of Hydrocarbon Measurement
Year Published: 2011
Abstract: What do you do I someone asks you to collect a natural gas sample? Do you panic? Do you use the same sample procedure your co-worker has been using for 30 years? Ordo you refer to API Chapter 14.1 and do it correctly? Overview Sample System Location Sample System Design and Operation Field Sampling Procedures Sample Collection Equipment and Procedures Sample Identification Sample Transportation Receiving Samples at the Lab Inspecting and Pre-conditioning Samples Sample Injection System GC Performance Verification Calibration Standards - Preparation and Use Data Verification / Data Mapping Six Sigma Processes Sample System Location Guidelines 1. Close to the meter, preferably just downstream of it, with at least 5 nominal pipe diameters (5D) of straight run before the sample point. 2. No obstructions to flow are allowed in the upstream section before the sample point. 3. No fittings or obstructions should be located within about 3D downstream of the sample point. 4. Sample points upstream of the meter are acceptable (not preferred), but must not be in the engineered upstream section of the run, where it would only constitute a flow disturbance and destroy the integrity of the meter run. In this figure, what deficiencies do you see? 1. No Probe 2. horizontal tap 3. No heat 4. No insulation

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