-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling14 Opemting procedures14.1 General precautions14.1.1 It is important that the principles of design given in this International Standard should be met by the selected automatic sampler and that it should be correctly installed and operated.14.1.2 ...
-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling13 Safety precautions13.1 It is essential that the safety precautions set out in this clause should be applied rigorously as the minimum necessary for safe operation. These precautions should be used in conjunction with the appropriate national ...
-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling12 Sample handling12.1 General12.1.1 The method of handling samples between the point at which they are extracted or drawn and the laboratory test bench or sample storage are devised to ensure that the nature and integrity of the sample are maintained.12.1.2 ...
-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling11 Sample receivers and containers11.1 Sample receiverThe sample receiver should be equipped with a level indicator or equivalent device, for example a weighing system, for monitoring purposes, and a high-level shut-off or alarm device.Means should ...
-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling10 Flow measurement10.1 Accuracy and rangeabilityA flow-proportional sampler requires a flow signal to pace the sampler. The flow transmitter should have enough rangeability (turndown) to produce a reasonably accurate signal over the expected flow ...
-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling9 Control equipment9.1 FunctionThe functions of the control equipment for an automatic sampler are to control the separating device to take either a flow-proportional sample or a fixed-rate sample, and it may also include a system toa) continuously ...
-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling7 Sampling probe design7.1 The sampling probe and/or the separating device should be of sufficient strength to withstand the bending moments imposed by the maximum flow in the main pipeline and to withstand the vibrations caused by vortex shedding. ...
-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling6 Profile testing6.1 IntroductionThis clause describes methods which may be used to test the uniformity of water distribution across the pipeline at the chosen sampling location.6.2 PrincipleProfile testing tan verify that a representative sample ...
-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling5 Selection of sampling point (including stream conditioning)5.1 GeneralAs has been emphasized in clause 4, it is essential that the sampling probe is presented with a portion of the liquid flowing in the Pipeline which is representative of the ...
-
ISO 3171 Petroleum liquids - Automatic pipeline sampling
ISO 3171 Petroleum liquids - Automatic pipeline sampling4 Principles4.1 PurposeThis clause defines the principles which it is essential to observe during sampling operations in order that the representativity of the sample taken corresponds to the specifications of this International Standard, and meets ...
