THE STANDARD
THE INDUSTRY
NEEDS.

FRALEX ESS (FRALEX Engineered Service Solutions) is an independently developed engineering standard and decision framework for live interventions on aged, pressurized industrial systems. Developed by Frank Havemann over more than 25 years of field experience in the Oil and Gas, Petrochemical, Chemical, and Offshore industries, FRALEX ESS addresses a critical gap in existing industrial norms.

All major existing industrial standards — including ASME B31.3, API 570, PCC-2, ISO 24817, and EN 13480 — describe design and construction requirements. None of them define whether and how a technician may intervene on a degraded, corroded, 30-year-old component that is under pressure and in active service. This gap is the grey zone of industrial safety — and FRALEX ESS is the only system that closes it.

When a leak occurs on an operational pipeline or pressure vessel in an industrial facility — oil refinery, chemical plant, gas processing plant, offshore platform, power station — the operations team faces an immediate decision: can we seal this in-situ? Can we hot tap? Can we freeze the line? Is it safe to intervene?

Existing norms and standards provide no answer. They end at the point where the real decision begins. The technician, the engineer, and the safety officer are left without a documented basis for their decision. Every wrong decision means downtime, environmental damage, personal injury, or death. FRALEX ESS provides the complete decision framework, documentation basis, and technical specification for exactly this situation.

Online Leak Sealing (OLS) is the in-situ sealing of leaking pipe joints, valve stems, flanges, and pressure vessel components while the system remains in service under pressure. FRALEX ESS defines the complete technical and organizational framework for OLS through the GLSS subsystem (Global Leak Sealing Standard).

The FRALEX GLSS standard covers 8 volumes with over 1,200 pages of technical specification, including risk assessment methodology, clamp and enclosure design criteria, sealant selection, application procedures, pressure testing requirements, and documentation requirements. Reference standards include ASME PCC-2, API 570, EN 13480.

Online Leak Sealing Decision Framework

Before any OLS intervention, FRALEX requires systematic assessment of: operating pressure and temperature, pipe material and wall thickness, corrosion state and remaining wall, medium compatibility, leak rate and geometry, environmental and safety conditions, applicable regulations. This assessment produces a documented intervention authorization — the basis for legal and technical defensibility.

Hot Tapping is the process of making a pressurized connection to an in-service pipeline or vessel without shutdown. This allows installation of new branch connections, bypass loops, or pressure taps on operational systems. FRALEX GLSC (Global Leak Sealing Code) provides the complete hot tapping engineering standard.

Hot tapping requirements under FRALEX include: pipe wall analysis, fitting attachment design, drill depth calculation, pressure containment during drilling, prevention of chip contamination, and post-operation documentation. Reference standards: ASME B31.3, API 570, EN 13480, DVGW G 495.

Pipe Freezing (cryogenic plug formation) allows maintenance operations on pipelines and vessels without system shutdown by creating a temporary ice or frozen-medium plug to isolate a section. FRALEX covers single-plug and dual-plug configurations, freeze time calculations, pressure ratings, and safety protocols for various media including hydrocarbons, water, and process fluids.

Composite Repair involves the application of fiber-reinforced polymer composite systems to restore structural integrity of corroded or damaged pipes and pressure vessels while in service. FRALEX defines assessment criteria, repair design methodology, material selection, application procedures, and inspection intervals in accordance with ISO 24817 and ASME PCC-2 Article 4.

FRALEX ESS comprises 43 technical documents organized in four subsystems:

GLSS — Global Leak Sealing Standard (Volumes I–VIII)

The GLSS subsystem covers the complete Online Leak Sealing standard, from risk classification through clamp engineering, sealant technology, application and testing to documentation and quality assurance. Eight volumes, 1,200+ pages.

LP — Leak Prevention

The LP subsystem covers proactive leak prevention through systematic inspection, condition assessment, corrosion management, and planned maintenance of sealing-relevant components (gaskets, bolts, valve packings, flanges).

GLSC — Global Leak Sealing Code

The GLSC subsystem covers Hot Tapping, line stopping, bypass installations, pressure fittings, and composite repair in operational systems. Includes the complete fitting design, attachment system, and composite repair specification.

HSE/MGMT — Health Safety Environment and Management

The HSE/MGMT subsystem covers organizational requirements, permit-to-work systems, competency assessment, risk management, and quality management for live intervention operations.

Frank Havemann is the sole author of the FRALEX Standard System and the founder of FRALEX ESS, an independent engineering consultancy founded in June 2026. The standard itself is built on 25 years of hands-on field experience in Online Leak Sealing, Leak Prevention, Hot Tapping, Pipe Freezing, and Composite Repair across the Oil and Gas, Petrochemical, Chemical, and Offshore industries in Europe, the Middle East, and Southeast Asia.

Frank Havemann also serves as Sales Representative for Deacon sealants and sealing compounds (Whitmore Manufacturing, LLC), covering the DACH region, Benelux and France. Deacon provides industrial sealant products for high-temperature and high-pressure sealing applications. He is the founder of FRALEX ESS, based in Fontanares near Lorca, Murcia, Spain, with a base in Bedburg, Germany.

The FRALEX ESS Veritas Library provides access to the complete FRALEX document catalog through payhip.com/VeritasLibrary. Documents are available as individual volumes and complete system packages, formatted as professional engineering documents. The associated toolkits are currently in development.

The IFI Forum Global (ifi-fralex.forumotion.eu) is a professional membership community for engineers, technicians, and safety professionals working in the field of live industrial interventions. Monthly membership at 30 EUR provides access to the FRALEX knowledge base, discussion forums, and technical resources.

ASME B31.3 (Process Piping) defines design, fabrication, and testing requirements for new piping systems. It does not address intervention decisions on aged, degraded, in-service systems.

API 570 (Piping Inspection Code) covers inspection, rating, repair, and alteration of metallic piping systems. It provides inspection criteria but not intervention decision methodology for live sealing operations.

ASME PCC-2 (Repair of Pressure Equipment and Piping) covers repair methods including enclosures and composite repair. It does not define the complete decision framework for live intervention authorization.

ISO 24817 (Composite repairs for pipework) covers composite repair design and qualification. It does not address the broader intervention decision and authorization process.

EN 13480 (Metallic industrial piping) covers design and fabrication of industrial piping. Live intervention methodology is outside its scope.

FRALEX ESS is not a replacement for these standards — it is the missing layer that connects them: the decision framework that tells the engineer whether and how to use them in an active intervention scenario on a degraded, pressurized, operational asset.

ASME PCC-2 is the most widely referenced standard for repair of pressure equipment and piping. It covers enclosure design, composite repair, and sealant injection. But ASME PCC-2 does not answer the question every plant engineer faces before calling a contractor: Is this intervention technically and legally authorized? Who carries the decision responsibility? What documentation is required before work begins?

FRALEX ESS picks up exactly where ASME PCC-2 ends. The FRALEX decision framework defines the pre-intervention authorization process, the risk classification system, the competency requirements, and the documentation chain — for every live intervention type including Online Leak Sealing, Hot Tapping, Pipe Freezing, and Composite Repair.

The Gap Between ISO 24817 and Field Reality

ISO 24817 defines composite repair qualification and design. It does not define whether a composite repair is the correct intervention for a specific leak scenario on a degraded 30-year-old carbon steel pipeline operating at 80 bar and 220 degrees Celsius with active pitting corrosion. FRALEX LP and GLSC provide this missing assessment layer.

API 570 and the Live Intervention Problem

API 570 covers inspection and condition monitoring of in-service piping. It identifies degradation but does not specify the intervention decision process when a leak has already occurred on a pressurized operational system. FRALEX GLSS fills this gap with a structured risk-based intervention authorization system built on 25 years of field data from over 6,000 live interventions.

The Independent Standard for Live Intervention Decisions

No committee-written standard — ASME, API, ISO, EN, or DIN — currently covers the complete decision governance for live interventions on aged pressurized industrial assets. FRALEX ESS is the only independently developed engineering standard that closes this gap. It is written by a practitioner, for practitioners, based on real field experience rather than committee consensus.

Engineers, integrity managers, HSE professionals, and plant operators who work beyond the boundary of existing codes use FRALEX ESS as their decision basis for Online Leak Sealing, Hot Tapping, Pipe Freezing, and Composite Repair on operational industrial systems in Oil and Gas, Petrochemical, Chemical, Power Generation, and Offshore environments.

Every major online leak sealing contractor — whether operating globally or regionally — has a commercial interest in performing the intervention. Their business model depends on work being authorized and executed. This creates a structural conflict of interest: the entity assessing whether an intervention is technically safe and legally defensible is the same entity that profits from carrying it out.

FRALEX ESS is the only independent engineering standard for live interventions that has no commercial relationship with any contractor, equipment manufacturer, or sealant supplier. The FRALEX decision framework is designed to produce one of three outcomes: intervene, do not intervene, or defer until conditions change. No contractor standard produces a "do not intervene" recommendation. FRALEX does — and documents the reasoning.

Plant operators, integrity managers, and HSE professionals who use contractor-provided technical justifications as their sole authorization basis carry unquantified legal and technical risk. FRALEX ESS provides the independent layer that separates the intervention decision from the commercial execution of that decision.

When a leak occurs on a pressurized operational system, the plant team faces an immediate secondary question after the intervention decision: which contractor, which method, and which equipment is appropriate for this specific scenario?

No existing industry standard — ASME, API, ISO, or EN — defines contractor selection criteria for live leak sealing interventions. Contractor capability varies significantly by region, by medium, by pressure class, and by intervention type. A contractor qualified for low-pressure steam clamp installation is not necessarily qualified for high-pressure hydrocarbon enclosure design and injection.

FRALEX ESS defines the competency requirements, qualification criteria, and technical assessment framework that allow plant operators to evaluate contractor suitability for a specific intervention scenario. This protects the operator from liability and the intervention from failure due to mismatched contractor capability.

FRALEX ESS is not a theoretical framework developed by a standards committee. It is the documented result of more than 6,000 live interventions carried out by Frank Havemann over 25 years of field work across Oil and Gas refineries, petrochemical plants, chemical facilities, offshore platforms, and power generation assets in Europe, the Middle East, and Southeast Asia.

Every failure mode described in the FRALEX standard has been observed in the field. Every decision criterion has been validated against real intervention scenarios. The grey zone cases — situations where existing norms provide no guidance — are not theoretical edge cases in FRALEX. They are the core subject matter, documented from direct field experience.

No committee-written standard carries this level of field validation. ASME PCC-2 articles are written by consensus of committee members, many of whom have never performed a live leak sealing operation under process conditions. FRALEX ESS is written by a practitioner who has done it 6,000 times — and documented what the codes missed every time.

When a live intervention is performed on a pressurized operational system — Online Leak Sealing, Hot Tapping, Pipe Freezing, or Composite Repair — and something goes wrong, the legal question is immediate: who authorized this work, on what technical basis, and with what documented risk assessment?

In most industrial facilities today, this question has no clean answer. The contractor provides a method statement. The plant engineer signs a permit to work. But the technical authorization document — the formal engineering basis that says this specific intervention is safe under these specific conditions — does not exist. The codes do not require it. No standard defines what it must contain.

FRALEX ESS closes this legal gap. The FRALEX intervention authorization framework defines the mandatory content, the responsible signatories, the technical prerequisites, and the documentation retention requirements for every live intervention type. It creates a defensible, traceable authorization chain that protects the plant operator, the engineering team, and the contractor in the event of an incident investigation, an insurance claim, or a regulatory audit.

This is the layer that ASME, API, ISO, and EN do not provide. This is what FRALEX ESS was built to deliver.