IP 15 Research report-Dispersion modelling and calculations in support of EI Model code of safe practice Part Area classification code for. Hi I am urgent need of a PDF copy of the above file, can anyne help? Thanks. Institute Of Petroleum Ip15 Area Classification Code For Petroleum Ins – posted in Safety and Chemical Processing Incidents: HiDoes anyone.

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The British Petroleum Company p. Safety Blitz – Electri A classification and c The information contained in this document is subject to the terms and conditions of the agreement or contract under which the lp15 was supplied to the recipient’s organisation. None of the information contained in this document shall be disclosed outside the clsasification own organisation without the prior written permission of Manager, Standards, BP International Limited, unless the terms of such agreement or contract expressly allow.

It provides detailed guidance for petroleum fluids and for flammable fluids similar in physical characteristics to petroleum fluids. There are also recommendations for specific definitions and ocde. All text is cross referenced and qualifies, modifies or adds to the requirements of IP Text in italics is Commentary.

Commentary provides background information which supports the requirements of the Recommended Practice, and may discuss alternative options. This document may refer to certain local, classificatio or international regulations but the responsibility to ensure compliance with legislation and any other statutory classificaion lies with the user. The user should adapt or supplement this document to ensure compliance for the specific application. Feedback and Further Information Users are invited to feed back any comments and detail experiences in the application of BP RPSEs to assist in the process of their continuous improvement.

See Quarterly Status List for contacts. See Appendix C1 for Commentary. This means that installations should be designed to BP Group Recommended Practices and Specifications for Engineering or to other codes and standards approved by BP as technically acceptable alternatives.

Substitution for IP 15 1.

Institute Of Petroleum Ip15 Area Classification Code For Petroleum Ins

The responsible person shall approve the classification but may delegate authority for the work to others. The work, which requires an interdisciplinary approach, should be carried out by engineers who have knowledge of the process systems and equipment, in consultation with safety and electrical engineering personnel as appropriate. Agreements reached on area classification shall be recorded formally. The form shown in Figure 1 may be used. There is no requirement to include details of the type arew protection.

Area classification carried out for BP by a third party, i. Substitution for to IP 15 1. The responsible person will vary depending on the Business and whether the classification is for an existing site or a Project. On an operating site the responsible person could be, for example, the site Operations Manager who would be responsible for ensuring that classification was complete and updated as required.

On a Project, it could be the Project or Engineering Manager depending on the size. With a Contractor involved, the initial work will normally be carried out by the Contractor, preferably with BP involvement as the classification is developed.

Depending on the Project organisation, it may be necessary for both Contractor and BP to appoint a responsible person. The composition of the team recognises that area classification itself but not equipment selection is primarily a process rather than an electrical engineering function. The following shall be added to the third paragraph: A flammable mist can be produced from Class II 1 and Class III 1 liquids and even from unclassified liquids if the release were from a high pressure system through a small diameter orifice.

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For the purposes of area classification there is no general requirement to classify as hazardous high flash point liquids handled below the flash point. However, it must be appreciated that such liquids can be hazardous under certain conditions.

BP may specify an exception to this if it can be confirmed that the liquid cannot be atomised or raised above the flash point on release. Classification of storage tanks should be in accordance with Chapter 3 of IP 15 as amended by this document.

Substitution for IP 15 2. As written, IP 15 would include hydraulic oils as hazardous because they can produce under certain conditions a mist which can be ignited by an ignition source with sufficient energy.

Such conditions are unlikely and there is no indication from operations that classification of hydraulic system is necessary.

The tighter requirements for processing areas do take account of the fact that processing areas normally contain hot lines. The exception should only be made if the area is free of hot lines and the fluid viscosity and operating pressure are such that mist formation is unlikely.

Higher viscosity liquids are less likely to form a mist. Conversely, processing them on a plant free from steam lines is abnormal. The pressure of 5 bar g is probably the minimum required to produce a mist with a low viscosity oil.

Any exception to this shall be subject to approval by BP. Dode to IP 15 3. For tanks of diameter 10m or less, the distance may be reduced to 7. Tanks with a nitrogen or fuel gas blanket which do not vent to atmosphere, e. The area shown as Zone 1 in Figure 3. Fixed roof tanks with a nitrogen blanket and venting to atmosphere shall be classed as a primary grade source of release.

The resulting Zone 1 should extend vertically from the island base to 2 m above the walkway. The horizontal extent should cover the total area of the island and should extend at least 2 m from the loading arm in the parked position. The dimensions shown in IP 15 Figure 3. Amendment to IP 15 3.

Classification as Zone 1 should be considered when more than three vehicles a day unload at a specific point. Amendment to IP 15 Figure 3. With an open area derrick non enclosed and an open area substructure it is good practice to classify all classifictaion the space within the derrick as Zone 2. There shall be a Zone 2 area extending 7. Substitution for IP 15 4. Onshore, it is the preferred practice for mud tanks to be located in an open area. Offshore cove in onshore areas with severe weather arez this can be impracticable.

In accordance with Table 6. There shall be a Zone 2 hazardous area extending from all apertures in accordance with Figure 6. A sheltered area containing mud tanks should be classified as Zone 2. The Zone 2 hazardous area shall extend outside any apertures with the extent based on Figure 6. The volume within the tank shell above the mud classificatiom be Zone 1 for adequately and inadequately enclosed areas and for sheltered areas. In enclosed areas, mud tanks are often fitted with local extraction ventilation above the tanks.


In such cases the air flow may be sufficient to classify the volume within the tank shell as Zone 2. Each case should be considered individually. Drilling mud normally flows between equipment in an open or loosely covered ditch.

With a hazardous mud the ditch will be a primary grade source of release and therefore should preferably be in an open area.

In this case there shall be a Zone 1 hazardous area extending 3 classifkcation horizontally and vertically upwards from the ditch and vertically downwards to a solid floor, or for 9 m, whichever is less. Again this can be impracticable offshore and in onshore areas with severe weather conditions. The effect of a primary grade source in an enclosed area is considered in Table 6. With local extraction ventilation, the ventilation rate can be high enough to prevent the primary grade source influencing the whole module see Note 6 of Table 6.

The local ventilation can be sufficient to classify the area around the ditch as Zone 2. Again each case should be considered individually. It removes anomalies with other parts of the IP code and provides guidance applicable to mud tanks not in an open classiflcation, a common offshore situation.

Local extraction ventilation is often fitted to mud tanks in enclosed areas to improve the working environment.

With a correctly designed system with a hood the flow of air will almost certainly be sufficient to avoid classifying the volume within the tank as Zone 1. The rate of vapour production from a non boiling liquid in a tank can be estimated from: A sheltered area containing shale shakers should be classified as Zone 2.

In adequately ventilated and sheltered areas the area in and around the shaker shall be Zone 1 see Figure 4. Shale shakers are also often fitted with local extraction ventilation. In such cases the air flow may be sufficient to allow the Zone 1 area to be classified as Zone 2. Each case shall be considered individually.

IP15 hazardous area classification guidelines – OGnition

The air rate required may be estimated from the information in 4. On shale shakers, there can be significant gas release from associated arew which could be the major factor in estimating the air rate required. This is covered in the amendments to 4. Deletion of IP 15 4. In such a case the internal space should be classified in accordance with Table 6.

There need be no hazardous area drawn from apertures in the enclosure beyond that covered by the area within which the enclosures lie. There shall be a Zone 2 hazardous area extending from the periphery of classificatkon pump claasification a hazard radius of 7. There shall be a Zone 1 area extending 0. All pumps are now classified in a consistent manner.

Such drains and vents should be regarded as secondary grade sources of release. Substitution for IP 15 5. The shutdown procedures should be planned to avoid the release to atmosphere of quantities larger than those considered in area classification.

The clause now agrees with 5.