NORSOK STANDARD P-001 Process design, Edition 5, Sep. 2006
The NORSOK standards are developed by the Norwegian petroleum industry to ensure adequate safety,
value adding and cost effectiveness for petroleum industry developments and operations. Furthermore,
NORSOK standards are, as far as possible, intended to replace oil company specifications and serve as
references in the authorities’ regulations.
The NORSOK standards are normally based on recognised international standards, adding the provisions
deemed necessary to fill the broad needs of the Norwegian petroleum industry. Where relevant, NORSOK
standards will be used to provide the Norwegian industry input to the international standardisation process.
Subject to development and publication of international standards, the relevant NORSOK standard will be
The NORSOK standards are developed according to the consensus principle generally applicable for most
standards work and according to established procedures defined in NORSOK A-001.
The NORSOK standards are prepared and published with support by The Norwegian Oil Industry
Association (OLF), The Federation of Norwegian Industry, Norwegian Shipowners’ Association and The
Petroleum Safety Authority Norway.
NORSOK standards are administered and published by Standards Norway.
This edition replaces edition 4 from 1999.
Significant changes are made in the following clauses:
• Clause 5 regarding use of instrument based systems for secondary protection replaces the HIPPS (high
integrity pressure protection system) clause in edition 4. This clause has been simplified and adapted to
governing international standards. However, limitations regarding application of such systems are
• Clause 6, Table 3: Revised numbers regarding flow capacity in near horizontal pipes.
• Clause 7 regarding isolation principles has been restructured.
• Clause 8 regarding insulation and heat tracing has been simplified to avoid duplication of requirements in
In general, references have been updated to reflect development of international standards.
Requirements specific to drilling systems have been deleted from this NORSOK standard.
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