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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The finished product is supplied as bi-metal-lined pipe.

What you can read next Mechanical lined pipes. The details of the various methods of manufacture are well documented.

API SPEC 5LD CRA Clad or Lined Steel Pipe

The delivered product usually has square ends, but other special ends may be furnished by agreement between the purchaser and manufacturer. 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 apu by the company achieves the composite between the inner and outer pipe and forms the mechanical liner pipe.

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


This specification covers seamless and welded clad apo line pipe and lined steel line pipe with enhanced corrosion-resistant properties suitable for use in pipeline transportation systems in the petroleum and natural gas industries.

Through the composite technology, the optimal composite effect of mechanical liner can be achieved, and the shear stress between inside and outside metal layer can reach 2. Clad pipe Use of CRA-clad steel line pipe is familiar to the offshore oil and gas industry. Corrosion resistance to the process environment is provided by the internal CRA clad layer, typically 2.

API 5LD (Cert No : 5LD- ) ยป Cladtek

API 5LD clad piping,weld clading. 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. The clad can meet the corrosion-resistant specific performance requirements, and the backing layer can meet the strength and rigidity condition the structure required.

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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 metallurgically clad pipe options. 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.


Included are nominal pipe sizes NPS 25 mm 1 in. You must be logged in to post a comment.

Longitudinal or helical seam CRA clad steel pipe: The welding quality is stable, and the product size accuracy is high. A more-detailed description of the manufacturing process occurs presently.

In general, use 5kd clad or bi-metal- lined pipe allows the economic use of expensive CRA materials. 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.

Sizes greater than mm 84 in. Seamless or welded Lined steel pipe: The composite plate or coil is manufactured by hot rolling technology, which can achieve metallurgical bonding of 5lc atom between corrosion-resistant clad and the backing layer, the binding force reaches above MPa, the binding area rate can reach above