Penspen Integrity

Penspen Integrity's mission is to provide the international onshore and offshore pipeline community with a complete and independent integrity service, using a combination of:

  • First-class engineers
  • Sound engineering practice
  • State-of-the-art techniques
  • Innovative technology

The main focus of Penspen Integrity is the integrity of pipeline infrastructure - an essential factor in oil and gas production and asset management.


Penspen offer 5 types of audit:

  • Technical Audits are typically conducted on single pipelines but can also be performed on individual pieces of equipment or complete pipeline networks. An audit will be structured around the requirements of an appropriate engineering code such as IGEM/TD/1 or ASME B31.4 and will seek evidence that the pipeline is compliant with the code and may continue to operate safely and effectively.
  • Compliance Audits are based on a client's own documentation and seeks evidence that the client's personnel are carrying out the tasks as described in the documentation.
  • Legal Compliance Audits seek evidence that the client's systems and procedures are sufficient to ensure compliance with the relevant pipeline related legislation. An audit will address whether the client is obtaining all the necessary approvals and is managing the risk to people and the environment as required by the Regulatory Authorities.
  • PIMS Audits are conducted on the management arrangements that a client has established to ensure pipeline integrity. A PIMS audit will be structured around the various codes such as ASME B31.8S, API 1160, CEN TS 15173/4 and DNV RP 116 as well as Penspen's own experience of managing pipeline integrity.
  • Due Diligence Audits are typically conducted for clients who are intending to purchase an existing pipeline or system. They are a combination of Technical Audits and PIMS audits and seek to confirm that the pipeline or system was correctly designed, constructed and operated in accordance with sound industry practice and that the pipeline or system is in the condition claimed by the vendor.

Where an audit reveals non-conformities, recommendations for corrective action will be made and in the case of technical audits an assessment can be made to determine whether the pipeline may continue to be operated or whether remedial action is required.

Risk and Reliability Assessment

Pipelines must provide a safe method of transporting energy, and pipeline operators must ensure that the public, the environment and property are protected from any associated risks. Pipelines are safe because they are designed to recognised and proven design codes, and they are continually maintained and inspected during service. Operators are aware of the risks that a pipeline poses to the surrounding public and environment and take steps to ensure that the risk is kept to the lowest level that is reasonably practicable.  Read More

Applying risk based methodologies which allow risks to be measured and compared can provide considerable benefits, such as:

  • Saving money (by justifying changes)
  • Improving safety (by targeting resources)
The key benefit is that risk assessment allows decisions to be made and resources to be allocated within a transparent, logical and consistent framework.

Penspen Training

Penspen is a UK engineering consultancy company that specialises in the oil and gas sector. It also offers established training courses. We have provided technical and management training to hundreds of staff in Europe, North and South America, the Middle and Far East, and we are now the world leader in training in the pipeline industry.

We do far more than technical training courses: we can present courses on management and other business skills.

Penspen presents technical and management training courses all over the world. Our most popular courses are on pipeline integrity, but we are happy to present any course that a client needs. We offer:

  • Public courses (open to anyone)
  • In-house courses (special courses for a client)
  • Lectures (from one hour to four hours, on a selected topic)
  • Workshops, seminars and meeting facilitation.

Repair and Rehabilitation

Pipelines are damaged and fail. Causes of damage and failures include: corrosion, mechanical damage, pipeline instability, ground movement, cyclic pressurisation and cyclic thermal loading. All of these mechanisms will result in defects that weaken the pipeline. If these defects are severe then action will be required to strengthen or repair the pipeline and ensure its long term integrity.

Pipeline operators need access to safe reliable repair systems. They also need to be able to assess the need for repair and select appropriate repairs. Read More

Repair and Rehabilitation

Integrity Assessment

Pipelines can experience many forms of damage during their life, ranging from damage introduced at the time of manufacturing and construction, through to in-service damage due to corrosion or external interference. To establish the short and long term integrity of damaged pipelines, it is important to assess if the damage affects the integrity of the pipeline under the given loading conditions.

Defect assessment requires a structured and systematic approach. Penspen Integrity have extensive expertise and experience in assessing a wide variety of different types of pipeline and pressure vessels defects, and of applying defect assessment methods to the problems of defining inspection strategies, pipeline design and pipeline uprating. We have developed the Pipeline Defect Assessment Manual (PDAM) which defines best practice. We have also been involved in the development of new, advanced defect assessment methods.

Integrity Assessment

Pipeline Integrity Management Systems (PIMS)

Pipeline Integrity Management System is the collection of arrangements that collectively ensure the integrity of the pipeline. This assemblage of arrangements can be envisaged as a "wall" that separates the Pipeline Operator from an undesirable event.

The Pipe Integrity Management System should be comprehensively described within a manual or set of manuals. Without a documented PIMS a pipeline operator is vulnerable to personnel and system changes and will encounter difficulties when required to demonstrate the effectiveness of the arrangements to senior management, shareholders and the Regulator.

Pipeline Integrity Management Systems (PIMS)


Penspen has a team of 5 pipeline pigging specialists with extensive in-field and project management experience throughout the world. The Pigging team has a focus centred on providing independent advice to operators covering such aspects as when to inspect pipelines, which inspection technologies to choose and methods for pigging. Specialist technical advice and support is available during the preparation and execution phases of the actual operations.

Our independence from all pigging vendors and inspection companies results in a wide knowledge of products, technologies and services and a detailed understanding of their application in the market.


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Penspen Integrity Overview