Design and Manufacture of Scraper Traps

Glapwell was commissioned to design and manufacture 11 scraper traps to service a multi-product pipeline running from Durban to Johannesburg. The pipeline, consisting of 24-inch and 16-inch sections, was approaching the end of its economic life. The objective was to provide additional capacity for fuel transportation while ensuring compliance with ASME B31.4 standards.

Background

The Durban-Johannesburg multi-product pipeline is a critical infrastructure for transporting refined fuels across South Africa. Initially commissioned with 24-inch and 16-inch sections, the pipeline faced capacity constraints and operational challenges as it neared the end of its economic life. To maintain efficiency and safety, scraper traps were required for cleaning and inspection purposes.

Problem Statement

• The existing pipeline infrastructure lacked sufficient scraper trap capacity.
• Increased demand for fuel transportation required enhanced operational reliability.
• Compliance with ASME B31.4 standards was mandatory for safety and integrity.
• The solution needed to be cost-effective and delivered within strict timelines.

Solution Implemented

Glapwell undertook the design and manufacture of 11 scraper traps, engineered to:

• Handle multi-product flow (diesel, petrol, jet fuel).
• Integrate seamlessly with both 24-inch and 16-inch pipeline sections.
• Meet ASME B31.4 standards for liquid transportation systems.
• Include advanced features for pigging operations, inspection, and maintenance.

The project involved:

• Design Phase: Detailed engineering drawings, stress analysis, and material selection.
• Manufacturing Phase: Precision fabrication using high-grade steel and corrosion-resistant coatings.
• Quality Assurance: Rigorous testing for pressure integrity and operational reliability.

Results & Impact

• Increased pipeline capacity and operational efficiency.
• Enhanced safety and compliance with international standards.
• Extended service life of the pipeline infrastructure.
• Reduced downtime for maintenance and inspection.

Lessons Learned

• Early engagement with stakeholders ensured alignment on technical requirements.
• Incorporating modular design principles simplified installation and future maintenance.
• Compliance with ASME standards was critical for regulatory approval and operational safety.

Conclusion

Glapwell successfully delivered a robust solution that addressed capacity constraints and operational challenges for the Durban-Johannesburg multi-product pipeline. The project reinforced Glapwell’s reputation for engineering excellence and reliability in the energy sector.