Sunwen, the largest steel pipe manufacturer in China sales both high quality carbon steel, stainless steel and low alloys to global buyer. I can’t download API Specification 5LD 4th Mar. CRA Clad or Lined Steel Pipe, Please sent to me ([email protected])`. Thank at advance. Certificate of Authority to use the Official API Monogram. License Number: 5LD- ORIGINAL. @. The American Petroleum Institute hereby grants to.

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December 12, at pm4: The delivered ai usually has square ends, but other special ends may be furnished by agreement between the purchaser and manufacturer.

The welding quality is stable, and the product size accuracy is high. Clad line pipe can be manufactured by various techniques that include the forming and welding of hot roll bonded plate, hot co-extrusion, weld overlay, and manufacture of lined pipe. What you can read next Mechanical lined pipes. Significant cost savings on capital expenditure for production flow lines were achieved by the use of corrosion-resistant alloy CRA lined pipeinstead of solid CRA and pai clad pipe options.


The details of the various methods of manufacture are well documented. This specification covers seamless and welded clad steel line pipe and lined steel line pipe with enhanced corrosion-resistant properties suitable for use in pipeline transportation systems ai the petroleum and natural gas industries. In general, use of clad or bi-metal- lined pipe allows the economic use of expensive CRA materials.


Seamless or welded carbon steel pipe as the outer backing layer, and corrosion-resistant alloy pipe as the inner corrosion layer, using the limit elasticity hydraulic composite method innovated independently by the company achieves the composite between the inner and outer pipe and forms the mechanical liner pipe.

The finished product is supplied as bi-metal-lined pipe. Meanwhile, we develops specially the pipe ends automatic overlaying technology and NC machine tools specialized for beveling, which can process complex shape bevels such as U-bevel, and guarantees the conformity of pipe mouth diameter and bevel size, so as to operate pipe jointing on site.

The xpi plate or coil is manufactured by hot rolling technology, which can achieve metallurgical bonding of the atom between corrosion-resistant clad and the backing layer, the binding force reaches above MPa, the binding area rate can reach above API 5LD clad piping,weld clading. Sizes greater than mm 84 in.

API SPEC 5LD CRA Clad or Lined Steel Pipe

Log in to Reply. You must be logged in to post a comment. Manufacture of bi-metal-lined pipe is based upon use of traditional manufacturing routes for the primary materials, carbon-steel outer pipe, and CRA liner pipe.


Corrosion resistance to the process environment is provided by qpi internal CRA clad layer, typically 2. Included are nominal pipe sizes NPS 25 mm 1 in.

Through the composite technology, the optimal composite effect of mechanical liner apo be achieved, and the shear stress between inside and outside metal layer can reach 2. Presented here are the materials philosophy of the project team and the rationale for selecting bi-metal- lined pipe along with a description of the manufacture, fabrication, and installation of the flow lines.

Seamless or welded Lined steel pipe: The clad can meet the corrosion-resistant specific performance requirements, and the backing layer can meet the strength and rigidity condition the structure required.

API 5LD (Cert No : 5LD- ) ยป Cladtek

Clad pipe Use of CRA-clad steel line pipe is familiar to the offshore oil and gas industry. Longitudinal or helical seam CRA clad steel pipe: A more-detailed description of the manufacturing process occurs presently.

Other grades are subject to agreement between the purchaser and the manufacturer.