CRA Clad and Lined pipe

CRA-clad and lined pipes are generally used in petroleum industries for special working conditions like corrosion or severe temperature environments. For onshore and offshore pipeline systems, there are often high S, H2S, and CO2 chemicals in the transportation fluids. When these values reach a certain content it will make a big corrosion to the pipelines in Carbon and Manganum steel material like API 5L pipes and ASTM A106 pipes. In this case, the CRA clad and lined pipe is applied for this.

CRA material combined with carbon steel material is a great achievement for both the mechanical strength (Tensile and Yield strength), meanwhile to have excellent corrosion resistance performances. No matter the pipe's personality or to save for economic purposes, a clad and lined pipe is a perfect choice.

The point of manufacturing clad pipes is to use metallurgical ways to create the bond. With below manufacturing options:

• CRA Clad pipe with explosive power: Use explosive power to clad the internal alloy steel pipe to the external carbon steel pipe.
• Welding Overlay CRA Clad Pipe: Use welding methods to weld alloy steel rods on the carbons steel pipe.
• CRA Clad Steel Plate to weld to CRA pipe: By explosive power to clad alloy steel plate to carbon steel plate, then use LSAW welding process to manufacture plate to CRA Pipe.

Inconel alloy 625 is a non-magnetic, corrosion and oxidation-resistant, Ni-Cr-based solid solution strengthened deformed superalloy. Nickel alloy 625 is a nickel-chromium-molybdenum-columbium alloy, the major content of Nickel (minimum 58%), also called Inconel 625 or UNS NO6625. Other chemical content Chromium 20% to 23%, Columbium + tantalum 3.15% to 4.15%, Molybdenum 8.0% to 10.0%, columbium Cobalt allow 1.0% max if determined, Iron 5.0% max.

Inconel 625 is extremely resistant to a variety of unusually severe corrosive environments, including high-temperature effects such as oxidation and carburization, including corrosion. Because of the solid solution of the refractory Co and Mo in a Nickel-Chromium matrix, provides 625 outstanding strength and toughness in high temperatures ranging from low up to 2000°F (1093°C).

Using weld overlay cladding methods to clad inconel alloy 625 or alloy 825 material inside of the carbon steel pipe has been a popular option not only solves the corrosion resistant problem to suit different severe environments but also provides a high strength performance with a large save of cost.

For a lined pipe that is created through a mechanical bond on the carbon steel pipe, (put CRA pipe internal to connect to the external C-Mn steel pipe through mechanical procedures).

Options to manufacture the CRA lined pipe:

• Option 1 with external carbon steel seamless pipe internal alloy welded pipe: Outer Pipe (Backing Steel Pipe) Inspection - Cutting - Machining Backing Steel Pipe - Cleaning Inner Surface - Assembling Inner Alloy Pipe - Hydro forming - Cutting Lined Pipe Ends - Beveling - Welding - Sizing pipe End - Forming - RT - ET & Endoscope - Ultrasonic Test - PT - Measuring Size and Inspection - Marking - Packing.
• Option 2 with CRA lined or clad steel plate: Mechanical lined or clad Steel Plate Checking - UT for Lined Steel plate - Plate Beveling - Preforming - Forming to Pipe (JCOE) - Welding - Rounding - Hydrostatic test - Beveling pipe end - X-ray-test - Ultrasonic Test - Size Inspection and Measuring - Marking - Packing and Storage.

Another bonding process of CRA steel pipe is to use a Full-Length Pipe Expander rather than use Hydroforming machine. (Between two options a Full-Length-Pipe-Expander is better for bonding CRA material for lined pipe).

We supply CRA Clad and Lined pipes, Fittings, & Flanges:

• Clad or Lined standard: API 5LD, API 5LC.
• Outer Diameter Cladding pipe: 6” to 60”.
• OD range for CRA lined pipe: 1/2” to 24”.
• Thickness: Up to 80 mm (Clad pipe), 7 mm to 35 mm (For lined pipe).
• Maximum length: 12.3 meters.
• Backing steel pipe (mother pipe) material: Carbon Steel Pipe, C-Mn Steel Pipe, API 5L B, X42, X46, X52, X56, X60, X65, X70, X80 PSL1, PSL2 and SOUR NACE MR0175, ASTM A106 B, ASTM A333 Grade 6, etc.
• CRA Clad Pipe Fittings: Elbow, Cap, Tee, Reducer in ASME B16.9, Material in ASTM A234WPB, WPC, ASTM A420 WPL6.
• CRA Clad Flange: Welding Neck Flange, Slip Flange in ASME B16.5, B16.47 A/B, Material in ASTM A105, A350.
• Cladding and Lining CRA (Corrosion resistant alloy) material: Austenitic stainless steel, nickel alloy steel, Hastelloy C276, alloy 625, 825, S31803, S31254 titanium alloy steel duplex steel, etc.

Moreover, We are also capable of supplying clad pipe fittings and flanges.

CRA Clad or Lined Steel Pipe, Carbon steel pipe in ASTM A106 Grade B, Outer Diameter 16 in, Nominal Weight 62.58 lb/ft, Wall thickness Schedule STD. Inner Coating Lining or Cladding HASTELLOY C276 in Thickness 0.125 in / 3mm, External Coating Varnished, Nominal Length 12 Meter (40 FT), Ends Beveled.