| 摘要 |
A method of butt welding a first and second tubular to join them together, the tubulars being suitable for use in an underwater environment and normally being made from carbon steel and having a corrosion resistant alloy (CRA) provided on an internal face thereof, the method comprising: depositing from an external side of the first and second tubulars, a weld-filler material onto a butt joint between the first and second tubulars, then depositing from the internal/CRA side of the first and second tubulars, a weld-filler material onto a butt joint between the first and second tubulars. Preferably the weld filler on the external side is a carbon steel weld filler and for the internal side is a CRA weld filler. In this manner sufficiently strong circumferential welds may be provided especially for CRA clad tubulars. A method of deploying the tubulars underwater and an apparatus comprising tubulars welded together is also disclosed.
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