Containment Pipe Fitting Closure Collar Assembly
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Solution Overview
Problem
Existing secondary containment piping systems face challenges in joining inner and outer pipes due to the complexity of solvent cementing processes, difficulty in inspecting joints during pressure testing, and issues with locating and repairing leaks.
Innovation Solution
The method involves using a closure collar to secure inner and outer joints in a containment piping system, with pressure testing before securing, and fittings featuring centralizers and closure couplings that facilitate easier assembly and inspection, allowing for adhesive bonding or solvent cementing, and featuring annular ridges and tapered surfaces for precise alignment and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If solvent cementing is used to join inner and outer pipes, then the joints can be formed, but the installation process becomes complex and time-consuming due to multiple simultaneous joints requiring preparation and execution
Solution Approach 1:
The joining process is segmented into distinct phases: first joining the inner pipe to the inner fitting, then joining the outer pipe to the outer fitting. This segmentation allows each joint to be completed independently rather than requiring multiple simultaneous joints, simplifying the overall installation process while maintaining connection integrity
Solution Approach 2:
The inner joint is completed as a preliminary action before the outer joint is made. By securing the inner pipe to the inner fitting first, the system establishes a stable core connection that guides subsequent outer pipe installation, reducing the complexity of coordinating multiple simultaneous joints
2Reliability
If traditional containment piping systems are used, then the pipes can be joined, but inspection of inner joints during pressure testing becomes difficult and leak location becomes problematic
Solution Approach 1:
The inner fitting and inner pipe are nested within the outer fitting and outer pipe assembly. This nested configuration allows the inner joint to be accessed and inspected from the exterior through the containment structure, enabling pressure testing and leak detection without disassembling the containment system
Solution Approach 2:
The inner fitting acts as an intermediary structure that provides access to the inner joint inspection. By designing the inner fitting with accessible features, inspectors can detect leaks and assess joint integrity without directly accessing the buried or enclosed inner pipe connection
3Productivity
If multiple simultaneous joints are required for containment pipe installation, then the system can be assembled, but the installation time and labor requirements increase significantly
Solution Approach 1:
The installation process is segmented into sequential steps rather than requiring simultaneous execution of multiple joints. First, the inner pipe is joined to the inner fitting; then the outer pipe is joined to the outer fitting. This segmentation reduces the coordination complexity and time required compared to making multiple simultaneous joints
Solution Approach 2:
The inner joint is prepared and completed as a preliminary action before outer joint installation begins. This preliminary completion of the inner connection reduces the overall installation time by eliminating the need to coordinate multiple joint preparations simultaneously, thereby improving productivity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the installation process, enhances joint inspection and leak detection, and improves the reliability of containment piping systems by ensuring secure and inspectable connections.
Implementation Method 1
The securings may comprise at least one of adhesive bonding and solvent cementing
Implementation Method 2
The securings may comprise at least one of adhesive bonding and solvent cementing
Data Source
AI summary
A containment pipe fitting has an inner member (40; 260), an outer member (42; 262), and a plurality of centralizers (48) positioning the inner member within the outer member. The fitting has at least one connection interface (37; 38; 39; 254; 255) having an internal surface portion (72) of the inner member sized to receive and join a portion of an associated inner/main pipe (31; 32; 33) and an internal surface portion (80) of the outer member sized to receive and join the portion of an associated outer/containment pipe (34; 35; 36). The connection interface further includes an external surface portion of the outer member dimensioned to receive a closure coupling or collar (100; 100′).