4. Pipe joints or couplings
  5. Particular interface
  6. Tapered

Friedrich-Otto Koch

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Gas-tight joint for pipe linings and risers

Pipe joints or couplings – Particular interface – Tapered
Patent

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Method and device for controlling the welding process in the man

Electric heating – Metal heating – Of cylinders
Patent

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Method for making steel tubes or pipes of increased acidic gas r

Metal treatment – Compositions – Heat treating
Patent

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Multi-layer helical seam steel pipe

Metal working – Method of mechanical manufacture – Assembling or joining
Patent

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Multi-layer helical seam steel pipe

Pipes and tubular conduits – Distinct layers – Bonded to each other
Patent

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Profile ID: LFUS-PAI-P-981865

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