API 2508 : 1985

Section 1 - General
1.1 Scope
1.2 Referenced publications
1.3 Definitions
1.4 Safety
1.5 Roll over
Section 2 - Applicable codes and design pressure of
            tanks
2.1 Applicable design construction codes
2.2 Design pressure and temperature
2.2.1 Design presure
2.2.2 Design temperature
2.3 Nameplate
Section 3 - Distance requirements and exposure
            limitations
3.1 General
3.2 Minimum distance
3.2.1 Requirements
3.2.2 Classification
3.3 Exposure and other limitations
3.3.1 Location
3.3.2 Dike or drainage provisions
3.3.3 Drainage
3.3.4 Dike size
3.3.5 Subdivision
3.3.6 Drain closure
3.3.7 Materials
Section 4 - Foundations and supports for aboveground
            ethane and ethylene storage tanks and
            related piping
4.1 Applicable codes and specifications
4.2 Special requirements
4.2.1 Materials
4.2.2 Frost heaving
4.2.3 Basic foundation design
4.2.4 Design temperature
4.2.5 Floating foundation or piling
4.2.6 Loads
4.2.7 Support flexibility
4.2.8 Tank shell loads
4.2.9 Diagonal members
4.2.10 Design of supports
4.2.11 Anchorage
4.2.12 Drainage openings
4.2.13 Corrosion protection
4.2.14 Fireproofing
4.2.15 Fireproofing of secondary structural members
Section 5 - Tank accessories, including pressure- and
            vacuum-relieving devices
5.1 Mandatory equipment
5.1.1 Liquid level gaging equipment
5.1.2 Level alarm
5.1.3 Pressure gage
5.1.4 Pressure- and vacuum-relieving devices
5.1.5 Pressure and vacuum relief valve flow capacities
5.1.6 Pressure relief valve information
5.1.7 Pressure setting
5.1.8 Pressure relief valve installation
5.1.9 Discharge vents
5.1.10 Shutoff valves
5.1.11 Temperature indicators
5.2 Optional equipment
5.2.1 Sampling connections
5.2.2 Automatic and remote devices
5.2.3 Stairs, ladders, walkways, and platforms
5.2.4 Common discharge header
5.3 Tank accessory materials
Section 6 - Piping requirements
6.1 American National Standard Code for pressure
        piping
6.2 Pipe (including pressure tubing and excluding
        instrument piping)
6.2.1 Recommendations
6.2.2 Piping joints
6.2.3 Minimum specifications
6.3 Fittings
6.3.1 Threaded fittings and couplings
6.3.2 Buttwelding fittings
6.3.3 Socket-welding fittings
6.3.4 Packed-sleeve couplings
6.4 Plugs
6.5 Unions
6.6 Valves
6.6.1 Hydrostatic relief valves in liquid lines
6.6.2 Check valves
6.7 Welding
6.8 Insulation
6.9 Location, installation, and flexibility of
        piping, valves, and fittings
6.9.1 Mandatory practices
6.9.2 Recommended practices
Section 7 - Loading and unloading facilities
7.1 Rates of loading and unloading
7.1.1 Sizing
7.1.2 Design
7.2 Transfer, loading, and unloading equipment
7.2.1 Pumps
7.2.2 Valves
7.2.3 Circulation
7.2.4 Compressors
7.2.5 Flow indicators
7.2.6 Pressure gages
7.2.7 Emergency shutoff valves
7.3 Grounding and bonding
7.3.1 Static electricity
7.3.2 Stray currents
7.3.3 Lightning protection
7.4 Hoses and arms
7.4.1 Hose
7.4.2 Hose protection
7.5 Blowdown or venting of loading and unloading
        lines
7.6 Marking of valves in loading and unloading
        systems
7.7 Metering equipment used in loading and unloading
Section 8 - Fire prevention
8.1 General
8.2 Safety-precaution signs
8.3 Drains and blowoff lines
8.4 Fencing
8.5 Lights
8.6 Fire extinguishers
8.7 Roadways
8.8 Electrical installations and equipment
Section 9 - Refrigeration system
9.1 Load
9.2 Vapor handling
9.3 System accessories
9.4 Pressure-relieving devices

Outlines design, construction, and location of refrigerated, (including autorefrigerated) liquefied ethane and ethylene installations at marine and pipeline terminals, natural gas processing plants, refineries, petrochemical plants and tank farms (except above grade concrete tanks, frozen earth pits, and underground storage caverns or wells). Coverage includes: applicable codes and design pressure of tanks; distance requirements and exposure limitations; foundations and supports for aboveground ethane and ethylene storage tanks and related piping; loading and unloading facilities.