Advantages

Disadvantages

Easy to apply

Subject to oxidation and cracking

Minimal surface preparation required

Soil stress has been an issue

Long track record in certain environments without failure

Limitations at low application temperatures

Permeable to cathodic protection in event of failure

Environmental and exposure concerns

Associated with corrosion and stress crack corrosion failures

Advantages

Disadvantages

Simple application

Poor shear stress resistance

Many documented failures related to corrosion and stress crack corrosion

Shielding of cathodic protection

Adhesives subject to biodegradation

Advantages

Disadvantages

Excellent track record

Limited temperature range

Good handling

Poor shear stress resistance

Limited pipe sizes (<24 in. [610 mm] outside diameter)

Advantages

Disadvantages

Excellent adhesion and corrosion resistance

Low impact resistance

Does not shield cathodic protection

High moisture absorption and permeation

Advantages

Disadvantages

Excellent combination of properties

Best suited for electrical resistance welded pipes

High thickness to eliminate weld tenting

Advantages

Disadvantages

Excellent combination of properties

Suitable only for large diameter pipes and is not designed for small diameter pipes (<406 mm OD)

Conforms well to external raised weld profiles