2　Terms

2.0.1　Petrochemical plant

Refinery，petrochemical complex，petrochemical fiber plant，etc.，or their integrated complex where petroleum，natural gas，coal-derived syngas and their products are used as feedstocks to produce，store and transport various petrochemical products.

2.0.2　Plant site selection

Properly select an area or a site for plant construction.

2.0.3　General planning

To make an integrated planning to establish appropriate locational relationships among multiple projects of the site as well as collaboration projects of the site，and to make proper route planning for material transportation，based on the natural and social conditions，urban development planning，and the requirements of environmental protection and production safety，for the purpose to improve the integrate performance of the whole project.

2.0.4　Plant layout

To determine the relative relations and the spatial locations between the plant process units and various facilities based on the general planning.

2.0.5　Plant area

The area comprising process units and various facilities in the plant.

2.0.6　Production area

The area comprising process area，tank farm and loading/unloading area and relevant facilities.

2.0.7　Utility facilities

A general term that is used to refer to the facilities providing water，power and steam for the process.

2.0.8　Auxiliary facilities

The type of facility that is other than production and utility facilities but necessary to support the process operation.

2.0.9　Tank farm

An area that comprises several grouped storage tanks，including the associated pump area，power supply system and fire facilities.

2.0.10　Warehouse

The buildings（structures）and laydown areas used to store bulk feedstocks，products，semiproducts and spare parts.

2.0.11　Transportation facility

Dedicated railway，roads，terminals，trestles，and relevant facilities，and loading/unloading machines and tools provided for specific loading/unloading operations and transportation activities.

2.0.12　Administrative facility

The facility provided for plant-wide administration and production control.

2.0.13　Process equipment area

The area in the process unit where equipment and piping are grouped for process operations.

2.0.14　Block

An independent area that is divided by the roads and intended for performing specific functions.

2.0.15　Inter-block corridor

A strip zone located between battery limits or between battery limit and fence，which is used to construct roads，railway，aboveground pipe-racks，underground pipelines，belt conveyer and is intended for landscaping purpose.

2.0.16　Pipelines

A general term for piping fabricated by various materials，power cables，telecom cables and optical fiber cables.

2.0.17　Pipelines coordination

An activity to properly plan and arrange various pipe lines in the inter-block corridor in accordance with relevant specifications.

2.0.18　Interconnecting pipelines

The aboveground pipings，underground pipings and cables that are located between the plant areas in one industrial park or between the plant area and outside fence facilities，and used to convey the feedstocks，products，steam，etc.

2.0.19　Plant road for raw materials and products handling

The road inside the plant that is constructed for the motor vehicles to handle bulk raw materials or products.

2.0.20　Grading plan

Plan to reform the natural terrain of the site，and assign elevations and slopes for the construction site.

2.0.21　Grading plan with slight slope

Reforming the construction site into one or several planar grounds with continuous gradient and slope direction，the planar grounds are gently connected without significant height change.

2.0.22　Grading plan with terrace

Reforming the construction site into two or more terraces in different elevations，two adjacent terraces have an elevation difference，and are joined by slope or retaining wall.

2.0.23　Design water-level

The maximum water level used in design，which is calculated in accordance with flood prevention standard.

2.0.24　Calculated water-level

The design water-level plus water burst height and wave height.

2.0.25　Occupied building

A building housing persons who are regularly assigned there and perform the majority of their job function within the building，and one working day more than 40 personnel-hour.

2.0.26　Potential explosion source

The equipment/facility in a congestion process domain potential release flammable material may rise to vapor cloud explosion（VCE）.

2.0.27　Potential toxic source

The equipment/facility that is potential source of releasing toxic materials.