Method of inspecting pipe joints for use in a subsea pipeline
AssigneeVerderg Pipe Technology Limited
InventorsPeter ROBERTS, Alastair WALKER
Life of this patent
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Abstract
A method of inspecting a pipe joint for use in a subsea pipeline and a method of manufacturing a pipe joint for use in a subsea pipeline employing said inspection method are disclosed, the inspection method comprising the steps of: receiving a pipe joint; measuring the ovality of the pipe joint to obtain ovality data; determining that the ovality data does not exceed a predetermined maximum pipe joint ovality value; and carrying out external pressure collapse tests on a ring cut from one end of the received pipe joint, resulting in data representative of the hydrostatic collapse pressure of said pipe joint for use in confirming that the pipe joint is suitable for its intended use.
Claims22
A method of inspecting a pipe joint for use in a subsea pipeline, the method comprising the steps of:
- receiving a pipe joint;
- measuring the ovality of the pipe joint to obtain ovality data;
- determining that the ovality data does not exceed a predetermined maximum pipe joint ovality value;
- and
- carrying out external pressure collapse tests on a ring cut from one end of the received pipe joint, resulting in data representative of the hydrostatic collapse pressure of said pipe joint for use in confirming that the pipe joint is suitable for its intended use.
A method of manufacturing a pipe joint for use in a subsea pipeline, the method comprising the steps of:
- (a) manufacturing a pipe joint;
- and
- (b) inspecting the pipe joint using a method comprising the steps of:
- receiving a pipe joint;
- measuring the ovality data does not exceed a predetermined maximum pipe joint ovality value;
- and
- carrying out external pressure collapse tests on a ring cut from one end of the received pipe joint, resulting in data representative of the hydrostatic collapse pressure of said pipe joint for use in confirming that the pipe joint is suitable for its intended use.
Dependencies are inferred from the claim text.