This part of ISO 4266 gives guidance on the accuracy, installation, commissioning, calibration and verification of automatic level gauges (ALGs), of both intrusive and non-intrusive types, for measuring the level of petroleum and petroleum products having a Reid vapour pressure less than 100 kPa, stored in atmospheric storage tanks.<\/p>\n
This part of ISO 4266 is not applicable to the measurement of level in refrigerated storage tanks with ALG equipment.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 3<\/td>\n | TitlePage – Petroleum and liquid petroleum products\ufffd\u2014 Measurement of level and temperature in sto… <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | TableofContent – Contents Page <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Foreword – Foreword <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | Scope – 1\ufffd\ufffd\ufffd Scope NormativeReference – 2\ufffd\ufffd\ufffd Normative references <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | Clause1 – 4\ufffd\ufffd\ufffd Precautions Subclause2 – 4.1\ufffd\ufffd\ufffd Safety precautions Subclause2 – 4.2\ufffd\ufffd\ufffd Equipment precautions UntitledSubclause3 – 4.2.1\ufffd\ufffd\ufffd All of the ALG equipment should be capable of withstanding the pres… UntitledSubclause3 – 4.2.2\ufffd\ufffd\ufffd ALGs should be certified for use in the hazardous-area classificati… UntitledSubclause3 – 4.2.3\ufffd\ufffd\ufffd Measures should be taken to ensure that all exposed metal parts of … UntitledSubclause3 – 4.2.4\ufffd\ufffd\ufffd All ALG equipment should be maintained in safe operating condition … Subclause2 – 4.3\ufffd\ufffd\ufffd General precautions UntitledSubclause3 – 4.3.1\ufffd\ufffd\ufffd The general precautions given in UntitledSubclause3 – 4.3.2\ufffd\ufffd\ufffd Tank temperatures should be measured at the same time as the tank l… UntitledSubclause3 – 4.3.3\ufffd\ufffd\ufffd Levels measured for bulk transfer should be recorded promptly when … UntitledSubclause3 – 4.3.4\ufffd\ufffd\ufffd Whenever determinations of the contents of a tank are made before t… UntitledSubclause3 – 4.3.5\ufffd\ufffd\ufffd All parts of the ALG in contact with the product or its vapour shou… UntitledSubclause3 – 4.3.6\ufffd\ufffd\ufffd ALGs should have sufficient dynamic response to track the liquid le… UntitledSubclause3 – 4.3.7\ufffd\ufffd\ufffd Following the transfer of product, the tank should be allowed to se… UntitledSubclause3 – 4.3.8\ufffd\ufffd\ufffd ALGs should provide security to prevent unauthorized adjustment or … <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Clause1 – 5\ufffd\ufffd\ufffd Accuracy Subclause2 – 5.1\ufffd\ufffd\ufffd Intrinsic error of ALGs Subclause2 – 5.2\ufffd\ufffd\ufffd Calibration prior to installation Subclause2 – 5.3\ufffd\ufffd\ufffd Error caused by installation and operating conditions Subclause2 – 5.4\ufffd\ufffd\ufffd Overall accuracy Subclause3 – 5.4.1\ufffd\ufffd\ufffd General <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Subclause3 – 5.4.2\ufffd\ufffd\ufffd Use of ALGs for fiscal\ufffd\/custody transfer purposes Clause1 – 6\ufffd\ufffd\ufffd Installation of ALGs Subclause2 – 6.1\ufffd\ufffd\ufffd General Subclause2 – 6.2\ufffd\ufffd\ufffd Mounting location Subclause2 – 6.3\ufffd\ufffd\ufffd Manufacturer’s requirements Subclause2 – 6.4\ufffd\ufffd\ufffd Installation UntitledSubclause3 – 6.4.1\ufffd\ufffd\ufffd For fiscal\/custody transfer accuracy, an ullage ALG should be mount… UntitledSubclause3 – 6.4.2\ufffd\ufffd\ufffd As an alternative, an ullage-based ALG may be mounted on the roof o… UntitledSubclause3 – 6.4.3\ufffd\ufffd\ufffd Innage-based ALGs should be mounted at a stable location at the tan… UntitledSubclause3 – 6.4.4\ufffd\ufffd\ufffd Where possible, the ALG should be located in close proximity to the… <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Subclause2 – 6.5\ufffd\ufffd\ufffd Still-well design UntitledSubclause3 – 6.5.1\ufffd\ufffd\ufffd The still-well should be attached in either of the two ways describ… UntitledSubclause3 – 6.5.2\ufffd\ufffd\ufffd The still-well may be supported on the bottom of the tank. UntitledSubclause3 – 6.5.3\ufffd\ufffd\ufffd The still-well may be supported by a trunnion or hinge connected to… UntitledSubclause3 – 6.5.4\ufffd\ufffd\ufffd The upper end of the still-well and the sliding guide should be des… UntitledSubclause3 – 6.5.5\ufffd\ufffd\ufffd The recommended minimum still-well diameter is UntitledSubclause3 – 6.5.6\ufffd\ufffd\ufffd The distance from the bottom of the still-well to the bottom of the… UntitledSubclause3 – 6.5.7\ufffd\ufffd\ufffd The still-well should be perforated with one or two rows of slots o… UntitledSubclause3 – 6.5.8\ufffd\ufffd\ufffd After the tank has been hydrostatically tested, the still-well shou… Clause1 – 7\ufffd\ufffd\ufffd Initial setting and initial verification of ALGs in the field Subclause2 – 7.1\ufffd\ufffd\ufffd Introduction <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Subclause2 – 7.2\ufffd\ufffd\ufffd General precautions Subclause3 – 7.2.1\ufffd\ufffd\ufffd Initial requirements Subclause3 – 7.2.2\ufffd\ufffd\ufffd Manual reference level measurement procedure Subclause3 – 7.2.3\ufffd\ufffd\ufffd Reference measurement tape and weight certification Subclause3 – 7.2.4\ufffd\ufffd\ufffd Effect of weather Subclause3 – 7.2.5\ufffd\ufffd\ufffd ALG technology-specific considerations Subclause3 – 7.2.6\ufffd\ufffd\ufffd Application-specific considerations <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Subclause2 – 7.3\ufffd\ufffd\ufffd Initial settings of ALGs Subclause3 – 7.3.1\ufffd\ufffd\ufffd Setting against manual reference ullage measurements Subclause3 – 7.3.2\ufffd\ufffd\ufffd Setting against manual reference dip (innage) measurements <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Subclause2 – 7.4\ufffd\ufffd\ufffd Initial verification Subclause3 – 7.4.1\ufffd\ufffd\ufffd Introduction <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Subclause3 – 7.4.2\ufffd\ufffd\ufffd Verification conditions Subclause3 – 7.4.3\ufffd\ufffd\ufffd Initial verification procedures Subclause4 – 7.4.3.1\ufffd\ufffd\ufffd ALG verification by manual reference ullage (outage) measurements <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Subclause4 – 7.4.3.2\ufffd\ufffd\ufffd ALG verification by manual reference dip (innage) measurements Subclause4 – 7.4.3.3\ufffd\ufffd\ufffd Verification tolerance for ALGs in fiscal\/custody transfer application Subclause2 – 7.5\ufffd\ufffd\ufffd Record keeping <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Clause1 – 8\ufffd\ufffd\ufffd Subsequent verification of ALGs Subclause2 – 8.1\ufffd\ufffd\ufffd General Subclause2 – 8.2\ufffd\ufffd\ufffd Frequency of subsequent verification Subclause2 – 8.3\ufffd\ufffd\ufffd Procedure for subsequent verification Subclause2 – 8.4\ufffd\ufffd\ufffd Tolerance for subsequent verification Clause1 – 9\ufffd\ufffd\ufffd Data communication and receiving <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Bibliography – Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Petroleum and liquid petroleum products. Measurement of level and temperature in storage tanks by automatic methods – Measurement of level in atmospheric tanks<\/b><\/p>\n |