Composite pipe having excellent corrosion resistance and mechani

Details Composite pipe having excellent corrosion resistance and mechani Composite pipe having excellent corrosion resistance and mechani

1989-05-23

1990-07-24

Yee, Deborah

Stock material or miscellaneous articles

All metal or with adjacent metals

Workpiece with longitudinal passageway or stopweld material

428679, 428685, 428682, 428680, 428683, 138143, 138DIG6, B32B 1500

Patent

active

049434896

ABSTRACT:
Composite pipe adapted for use, for example, in line pipes for crude oil or natural gas producing oil wells and having excellent corrosion resistance and mechanical properties to withstand high temperatures and high pressures, the composite pipe having an outer layer made of a material comprising in % by weight 0.05 to 0.20% of C, up to 1.0% of Si, up to 2.0% of Mn, up to 1.0% of Cr, 0.2 to 2.0% of Ni, up to 1.0% of Mo, 0.05 to 0.15% of V, up to 0.1% of Al, and the balance inevitable impurities and Fe, the material being up to 0.45 in carbon equivalent expressed by: ##EQU1## an inner layer made of stainless steel, high alloy steel or like corrosion resistant alloy, and an intermediate layer substantially intermediate between the outer layer and the inner layer in composition and having a thickness of 10 to 100 .mu.m, the intermediate layer providing a boundary between the outer and inner layers and being metallurgically joint to the outer layer and the inner layer integrally therewith.

REFERENCES:
patent: 4178417 (1979-12-01), Oda et al.
patent: 4464209 (1984-08-01), Taira et al.
patent: 4872519 (1989-10-01), Kopecki

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