Nota: Stai modificando un prerequisito per la guida che stavi visualizzando. Tutte le modifiche avranno effetto su tutte 3le guide che includono questo passo.
Traduzione in corso passo 3
Passo 3
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Have two people place C wrenches on the riser main on opposite sides of each other.
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Have the two people with C-wrenches apply light upward pressure to the riser main while the base clamp operator loosens the clamp.
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Lift the pipe evenly, not exceeding the comfortable lifting height of either lifter. Re-secure the base clamp once the maximum lifting height has been reached.
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Lower the C-wrenches and repeat this step until the pipe coupling reaches the base clamp.
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