A carrier pipe is known as a primary or inner pipe, or a hollow cylindrical tube contained inside an outer sheath. Responsible for carrying fluids, the carrier pipe runs through an outer, insulated casing that acts as a containment system that protects against spills. In the oil industry, an outer containment pipe that protects an upward-running oil carrier pipe is sometimes called a riser.
Some carrier pipes have two containment pipes or containment pipes with double walls. These systems are called double containment systems. Double containment systems add advanced protection against leakage in pipes carrying hazardous liquids.
The choice of materials for the carrier pipe depends largely on the type of medium transported, and the operating temperatures and pressures. In oil industrial,carrier pipes is usually used according to ASTM A53.
ASTM A53 carrier pipe is available in a scheduled wall thickness 4 inch Schedule 40 pipe
or Schedule 80 and a standard lengths 6m or 12m.
Black and hot dipped, zinc-coated, welded or seamless smooth wall steel of not less than 10 gauge in wall thickness, with a coat of grey or red oxide primer.
A53 carrier pipe comes in three types(E,F,S)and two grades(A,B).
A53 pipe Type F, which is longitudinally furnace butt welded or continuous welded (Grade A only).A53 Type E, which is ERW welded (Grade A and B).A53 Type S, which is seamless pipe, produced by hot working, and possibly cold finishing (Grades A and B).
ASTM A53 oil carrier pipe is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas and air lines:
●Seamless steel line pipe transportation in petroleum industry.
●Boiler pipe, including over-heat pipe, boiling water pipe, locomotive smoke pipe.
●Heat-exchange pipe for refinery.