Pipe Coating Cutback Machine for Uniform FBE Exposure Bands
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Solution Overview
Problem
Current methods for cutting the external coating of carbon steel pipes to create a Collar (Cutback) and FBE Exposure Band are aggressive, causing stress and non-uniform surfaces, leading to coating detachment and corrosion, and are inefficient and costly, particularly in the production and installation of subsea and onshore pipelines.
Innovation Solution
A machine and device system, including the PPS Stationary Cutting Machine and PPS Automated Drawing Device, designed to cut and draw the external coating of carbon steel pipes with precision, ensuring the correct angle and width of the Collar (Cutback) and FBE Exposure Band, eliminating the need for brushing and reducing waste, while allowing for simultaneous cutting and drawing of the PPS System on rotating pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If brushing method is used to create Collar (Cutback), then the coating is removed, but the surface becomes non-uniform and causes coating detachment
Solution Approach 1:
The patent replaces the mechanical brushing system with a controlled burning system that uses thermal energy to remove coating. The burning process creates a uniform chamfer surface without the mechanical contact that causes non-uniformity and detachment in traditional brushing methods
Solution Approach 2:
The patent changes the removal mechanism from mechanical (brushing) to thermal (burning). By controlling the burning parameters such as flame intensity, exposure time, and movement speed, a uniform chamfer surface is achieved that eliminates the surface irregularities caused by mechanical brushing
2Ease of manufacture
If brushing and machining are used for Collar (Cutback) and FBE Exposure Band, then the coating is prepared, but the process is aggressive and causes stress
Solution Approach 1:
The patent replaces aggressive mechanical brushing and machining operations with a controlled thermal burning process. This substitution eliminates the mechanical stress and aggression that compromise coating integrity while still achieving the required Collar preparation and FBE Exposure Band
Solution Approach 2:
The burning process is applied as a preliminary treatment before final assembly. By pre-forming the Chamfer surface and creating the FBE Exposure Band through controlled burning, the coating is prepared in advance without subjecting it to subsequent aggressive mechanical operations that would cause stress and detachment
3Ease of manufacture
If traditional brushing and machining methods are used, then the Collar and FBE Band are created, but the process is time-consuming and costly
Solution Approach 1:
The patent merges multiple separate operations (brushing to create Collar, machining to create FBE Exposure Band) into a single integrated burning process. This consolidation eliminates the need for sequential mechanical operations, significantly reducing processing time and cost while maintaining quality standards
Data Source
AI summary
The present invention refers to a machine for cutting the external coating and methods for removing the Coated Pipe Preservation System for Onshore and Subsea Pipelines, called, for short, PPS System or PPS, represented in FIGS. 1 (1.1), (1.2), (1.3), and (1.4). This Machine, called the PPS Stationary Cutting Machine, represented in FIGS. 7 and 8, in addition to performing the cut at the correct angle (β), represented in FIG. 2 (2.4), makes the FBE Exposure Band (FBE Tail), represented in FIG. 2 (2.3), in order to ensure that the Collar (Cutback), represented in FIG. 2 (2.2), meets the specifications regarding dimensions (C) and (T), represented in FIGS. 2 (2.6) and (2.7), and the finishing at the interface with the Pipe External Coating, being applicable to straight pipes that rotate during the cutting of the external coating. The PPS Automated Drawing Device, represented in FIGS. 9 and 10, used together with the PPS Stationary Cutting Machine, is intended to draw and/or reposition the PPS System in an automated manner through the Cover (1.3, 8.3, and 9.5), increasing productivity and operational safety.Together with the PPS Automated Drawing Device, the assembly is installed in the PPS Cutting and Drawing Stations, represented in FIGS. 11 to 14, to be implanted in Onshore Bases (Spoolbases) (11), Type J (J Lay) (12) Launch Vessels, and Type S (S Lay) Launch Vessels (13), for the Construction and Installation of Subsea Pipelines (Subsea or Submerged Pipelines), and at the Pipe Sites (14), for Onshore Pipelines (Buried Pipelines).