EN ISO 13628-7:2006 PDF

Overview

EN ISO 13628-7:2006 (ISO 13628-7:2005) specifies requirements and recommendations for the design, analysis, materials, fabrication, testing and operation of subsea completion/workover (C/WO) riser systems run from a floating vessel. The standard applies to all new C/WO riser systems and can be used for modifications, operation of existing systems, and reuse at different locations or with different floating vessels. It is intended as a common reference for designers, manufacturers and operators to reduce the need for company-specific specifications.

Scope highlights

• Covers risers manufactured from low alloy carbon steels.
• Excludes risers made of titanium, composite materials and flexible pipes.
• Includes specific equipment such as riser joints and connectors, workover control systems, surface flow trees, lower workover riser packages, lubricator and retainer valves, subsea test trees, swivels, annulus circulation hoses, riser spiders, umbilical clamps, handling/test tools and tree cap running tools.
• Explicitly does not cover equipment like tubing hangers, internal/external tree caps, coiled tubing or wireline surface units and certain jumpers.

Key topics and technical requirements

• System requirements & functional requirements: Purpose, system description, modes of operation, barrier and safety principles.
• Design requirements: Loads and load effects, pipe and component design criteria, connectors and miscellaneous components.
• Materials & fabrication: Material selection rules for low alloy steels, fabrication, NDT and qualification of assembly procedures.
• Testing & verification: Pressure testing, hydraulic cleanliness, factory acceptance tests (FAT), qualification testing and system integration tests.
• Inspection, maintenance & monitoring: Periodic inspection, reassessment of risers and monitoring guidance.
• Documentation: Design basis, analysis, connector documentation, as-built records and operation manuals.
• Informative and normative annexes: Operational modes and system analysis, fatigue analysis, structural resistance methods, example calculations, purchasing guidance, seal and bolt preload guidance, connector qualification.

Practical applications

• Use the standard when designing, procuring, fabricating or operating subsea completion/workover riser systems for floating vessels.
• Helps engineers perform consistent riser design, fatigue assessment and connector qualification.
• Provides checklists for manufacturers and procurement teams to prepare testing, FAT and documentation.
• Supports operations teams in safe workover/completion planning, maintenance and reassessment for reuse or redeployment.

Who uses this standard

• Subsea engineers and system designers
• Riser and connector manufacturers
• Offshore operators and rig/vessel owners
• Procurement, QA/QC and maintenance teams
• Regulators and certifying bodies seeking harmonized technical requirements

Related standards

• Part of the ISO 13628 series covering subsea production systems; users should consult other parts of ISO 13628 and relevant national/international codes and industry regulations when applying this standard.