Помогите, пожалуйста, со следующими фразами:

Neck nozzle DN500, removable head from steel
Expanded into a strong pipe plate and welded in
Pipe bundle extendable

Контекст следующий:

Connections:
Thermal oil DN 150, PN16
Steam DN 150, PN16
Feed water DN 40, PN 16
Safety valve nozzle DN 65. PN 16

Diameter 1300 mm
Length 3000 mm
Total length approx. 3800 mm

Weight (without insulation) approx. 2080kg

Neck nozzle DN500, removable head from steel
Housing from steel
Pipes of St 35.8 (14 x 1.5 mm)
Expanded into a strong pipe plate and welded in

Pipe bundle extendable

Спасибо.