Fit up inspection for bearing housing and bearing seat;Fit up inspection for front plate on horizontal support box;Dimension control of the upper support box and lower support box ;Dimention inspection of upper back guide plate and lower back guide plateon intermediate plate;Welding and dimension control of leg structure; Inspect on the all structure of cantilever of Jack-up Drilling Platform;Inspection for Leg &Jack case &Jack support &Jack bracing;Plan and conduct inspectors to coordination with production, technology and other department NDT status, weld and material traceability of the leg structureCalibration all of survey measuring equipment and maintain calibration record. Ensure all of equipment in good condition and ready to use.Inspection on steel plate grade , bevel angle , misalignment，groove transition, scallop, tack welding, check line etc;Inspection on the main hull structure;

Preparation of quality management proceduresWelder qualification testMaterial traceabilityWelding visual inspectionCollect,collate,analyse measurement date,ensure the dimension tolerance of block shall meet the construction requirements.To write measurement form,analyse the accumulation of measurement dates.Constantly optimize the increasing amount of anti deformation.Not only ensure the block quality but also reduce the lost work hours.According to the drawings, to ensure that the correct materials used in the correct positions,Especially the special materials with special positions.Verification of structure size and form.To check assembly sequence and gap,groove form,welder qualification,welding sequence,welding materials,welding parameters are consistent with WPSs.Ensure the workers according to the requirements of construction to work,Analysis the reason of producting weld defects,train related person according to the result,to avoid repeatedly occurring similar defects.Ensure the overall situation of the block is qualified so that it can be accepted by owners and surveyors.Track the questions to be reaised by owners and surveyors , and prompt treatment.