CRA Clad Pipe and Lined Pipe

CRA (corrosion-resistant alloy) clad pipe and lined pipe are applied for the
anti-corrosion environment, and they have been considered as a new material in
the oil and gas pipeline systems. Since they are two kinds of steel material
that composite together through bonding processes. (Inner pipe material with
expensive stainless 316L or alloy steel Inconel 625, which we call CRA layer.
Outer pipe with carbon steel pipe that standards in API 5L or ASTM A106/A53,
ASTM A333 Grade 6, etc.)

Clad and lined pipes are specialized types of pipes designed to enhance
corrosion resistance and improve performance in various applications.
CRA refers to corrosion-resistant alloy. The CRA Clad and Lined Steel Pipe is
composed of conventional carbon steel or low alloy steel pipes and a corrosion-
resistant alloy layer. The CRA layer is metallurgically cladding to the
internal or external surface of the steel pipe. Carbon steel or low-alloy steel
pipe is called lining steel.

Inner CRA layer (0.25~6.0mm) normally such as Stainless steel, Duplex, Nickel
alloy, Titanium, Hastelloy, Monel, etc. which are suitable for high corrosion
environment.

Composition and Structure
CRA Clad Pipe consists of two main components:
Base Material: A conventional carbon steel or low alloy steel pipe, also called
backing steel.
CRA Layer: A corrosion-resistant alloy layer metallurgically bonded to the
internal (and sometimes external) surface of the steel pipe.

Clad and lined pipes are specialized types of pipes designed to enhance
corrosion resistance and improve performance in various applications.

Clad Pipes:
Definition: Clad pipes are made by bonding a layer of corrosion-resistant
material (such as stainless steel) to a carbon steel pipe. This combination
provides the strength of carbon steel with the corrosion resistance of the
outer layer.
Applications: Commonly used in industries like oil and gas, chemical
processing, and power generation, where exposure to corrosive environments is a
concern.

Lined Pipes:
Definition: Lined pipes have a protective lining (often made of materials like
PTFE, rubber, or other polymers) applied to the inner surface of the pipe. This
lining acts as a barrier against corrosive substances.
Applications: Frequently used in applications involving the transport of
aggressive chemicals, slurries, or other materials that could damage the
pipe’s interior.

Specification of CRA Cladding Pipe
Bare Pipe Seamless pipes and welded pipes
Standard of Bare Pipe API5L，ASTMA106，ASTMA333 ，ASTMA335, etc
CRA Material stainless steel and non-ferrous alloys: SS 304, SS 316, SS 317,
duplex, alloy 254, SMO 904, Incoloy alloy 825, Inconel alloy 625, Hastelloy C-
276, Inconel alloy 59, alloy 31, AL6NX, alloy 20, Monel 400, titanium, aluminum
and some copper alloys
Standard of CRA Material ASTMA240，A263，A264 ，A265，B898，B424，B443，
B619，B622，B , 675，B265，B551
Standard of CRA Cladding Pipe API5LD
Material Selection and Standard Specification
Base materials of the CRA clad steel pipes include seamless or welded line
pipes of API, ASTM, etc.

The CRA cladding or lining material covers an extensive range of stainless
steels and nonferrous alloys. SS 304, SS 316, SS 317, Duplex, Alloy 254 SMO
904, Incoloy alloy 825, Inconel alloy 625, Hastelloy C-276, Inconel alloy 59,
Alloy 31, AL6NX, Alloy 20, Monel alloy 400, Titanium, Zirconium, and some
copper alloys.

Generally, CRA-clad pipes shall be manufactured in accordance with API 5LD. The
base material (steel pipe) conforms to API 5L, ASTM A106, ASTM A333, ASTM A335,
etc. The cladding material shall conform to ASTM A240, A263, A264, A265, B898,
B424, B443, B619, B622, B675, B265, B551.

Advantages
Excellent corrosion resistance in harsh environments, including high
temperature, high pressure, and corrosive fluids.
Combines the strength and durability of carbon steel with the corrosion
resistance of CRA materials.
Cost-effective for large-diameter heavy pipelines, as the thin CRA layer
provides enhanced properties while minimizing expenses.
Applications
CRA Clad Pipes are widely used in various industries:

oil and gas industry,

Shipbuilding,

chemical plants,

power plants, and so on.

That’s because the CRA layer not only enhances the corrosion resistance of the
pipeline but also reduces the cost to a minimum.

Minimum Order: 10 sets