Perform an appearance size inspection for the spherical compensator. The allowable deviation of the pipe end circumference is ±6mm for nominal diameter greater than 1000mm and ±4mm for nominal diameter 1000mm or less. The diameter deviation of the wave crest is ±5mm.

(2) The spherical compensator should undergo pre-stretching or pre-compression testing and must not exhibit uneven deformation.

(3) The spherical compensator with a welded end should be installed facing the medium flow direction on horizontal pipelines, and the weld should be positioned at the top on vertical pipelines.

(S4) The spherical compensator should be aligned with the pipeline axis, without any deflection.

(5) During installation, temporary ground supports should be added at both ends of the spherical compensator. After the pipeline is installed and secured, the temporary facilities should be removed and check for uneven settlement. Guide devices should be installed on the two pipeline supports near the spherical compensator.