Production Riser - Top Tension

Top-tension requirement for a production riser given wet weight, internal content weight and safety margin - OSV / FPSO design input.

RiserTop tensionOffshore

Riser lengthmRiser wet weightkN/mContent weightkN/mSafety margin%

Wet weight + content: 4,800kN

Required top tension: 5,520kN

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

T_{top} = (w_{wet} + w_{content}) \cdot L \cdot (1 + m)

Symbol	Meaning	Unit
$w_{wet}$	Riser wet weight per unit length	kN/m
$L$	Water depth	m

Source: API Spec 2RD

In short

Top-tension requirement for a production riser given wet weight, internal content weight and safety margin - OSV / FPSO design input.

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