Oil Gas Tanks: Terminology and Use

The phrase oil gas tank covers a wide family of vessels for hydrocarbons and their byproducts; picking the right member depends on phase, pressure, and duty.

This overview maps oil gas tanks to the correct tank or pressure vessel type, the standards that apply, and a selection path.

Main Topic / Definition

Oil gas tanks range from atmospheric storage tanks (API 650) through low-pressure tanks to pressure vessels (ASME VIII) for gas and vapor service.

Storage vs pressure

· Atmospheric tank: liquid, near-ambient pressure.

· Low-pressure tank: slight positive pressure, vapor space.

· Pressure vessel: gas or vapor at meaningful pressure, ASME VIII.

Key Characteristics / Components / Types

Selection axes

· Phase: liquid, gas, or two-phase sets the boundary.

· Pressure: above ~15 psig typically moves you to ASME VIII.

· Volatility: drives floating roof or vapor handling.

Applications / Use Cases

Oil gas tanks appear at production, gathering, refining, terminals, and power plants - each with a different dominant duty.

· Refineries: mix of tanks and process vessels.

· Terminals: dominated by bulk atmospheric storage.

Technical Considerations

Confirm phase and pressure first; that single decision selects the code. Then address venting (API 2000), fire (NFPA 30), and containment.

· Space-saving: vertical integral tanks or racked layouts cut footprint where land is tight.

· Finished-product containers need handling and labeling compliance.

Advantages and Limitations

· Advantages: right-sized vessel improves safety and cost.

· Limitations: misclassifying phase/pressure creates code and safety gaps.

Comparison / Selection Guide

Best Practices / How to Choose

· Define phase and max pressure before selecting a form.

· Apply the governing code, not a default.

· Address venting, fire, and containment together.

Oil gas tanks is a family, not a product. Classify by phase and pressure, then apply the matching code and form.

Frequently Asked Questions (FAQ)

What is a oil gas tank and when is it used?

A oil gas tank is a containment or cover solution for oil gas tanks service, used where standard bulk tanks need material, roof, or coating specification to perform safely and meet code. Selection starts from the product and duty, not a default form.

What vessel type fits oil gas tank?

Classify by phase and pressure first: atmospheric liquid uses API 650 tanks, low-pressure vapor uses low-pressure tanks, and gas above roughly 15 psig uses ASME VIII vessels.

What should I specify beyond the tank for oil gas tanks?

Define the exact fluid (solids, pH, temperature), then the lining, cover, and any process integration. Pair with venting, fire, and containment per the applicable code.

How long does a oil gas tank last?

Service life follows material and maintenance: welded carbon steel with a good coating and bottom program runs decades; stainless and GFS extend life further. Inspection and lining care decide the outcome.

What are the most common failures to avoid with oil gas tank?

The usual problems are wrong coating for the product, ignored rim seals on floating roofs, under-specified venting, and no bottom-inspection plan. Address these at specification, not after commissioning.