11/2019 ● O nly one compensator is fitted between two anchors. ● T ie rods on lateral compensators are correctly fitted and are secure. Anchors/guides Anchors and guides on the pipeline must be placed as per the guidelines in EJMA so that: ● T he compensator is not subjected to dead-weight loads from the pipeline. ● T he expansion joint must be installed so that no forces and moments are transferred from the pipe system. ● T he pipeline does not sag, “hog” or “snake” between anchors or guides. ● D rop rods or hanger rods should be avoided, guides should be slide or roller type. ● W hen using compensators the distance must not exceed 4 x the nominal diameter of the pipeline. ● T he distance between the first and the second guide must not exceed 14 x the nominal diameter of the pipeline. ● T he distance between the remaining guides must not exceed 21 x the nominal diameter of the pipeline. This distance must be reduced if this is necessary in order to stabilize the pipeline. During installation ● W hen welding or grinding near the compensa- tor it should be protected against weld spatter and debris, we recommend use of a chloride- free welding blanket. ● C are must be taken to avoid accidental arcing on the thin-walled bellows in the compensator. ● T he compensator should be protected from damage caused by adjacent construc- tion work, splashes from mortar or plaster can damage the compensator and must be avoided. ● If the compensator is equipped with an inner sleeve, make sure the flow arrow on the com- pensator points in the direction of the system flow. ● W hen fitting angular compensators it is impor- tant that the hinge pins are in the correct orientation. 5 ● D o not apply torsion to the compensator to align the bolts on flanged units. ● C omponents such as tie rods, hinge links and gimbals must not be removed. They form part of the integrity and functionality of the compensator. ● C are should be taken with fitting tools, take care not to damage the bellows with spanners or wrenches when tightening bolts. ● O n flanged units ensure that over-long studs or bolts do not contact and damage the bellows. ● W hen compensators are supplied without external covers and insulation is to be added a lagging cover should be fitted to prevent insula- tion material becoming trapped between the bellows convolutions where it can prevent the bellows from functioning correctly. On completion of installation Before the completed system is tested and commissioned it should be subjected to a visual inspection. Many years experience has shown that careful checking of the installation before pressure testing and final commissioning will help to ensure successful installation and performance. Before pressure testing and as part of the inspection regime ensure that all temporary shipping and pre- tensioning devices (marked by yellow and black striped tape) are removed from the compensator. PRESSURE TEST Pressure test must be carried out according to the stated test specifications on the drawing and/or the tag plates on the compensator. Prior to pressure testing CHECK THE FOLLOWING ● H as the compensator been damaged during installation? ● Is the entire pipe system, especially anchors, guides and compensators, installed as shown in the drawings in the installation instructions? ● Is the compensator correctly fitted into the system and not used to correct fabrication inaccuracies? ● I s the flow direction of the compensator cor- rect?
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