Pipe/Features/Item

Plypipe 

All-plastic
pipe

Galvanized
pipe

materials

PE-AL-PE pex-al-pex MDPE-Al-MDPE

PPC or PE or PB or UPVC etc

steel

self weight

light

light

heavy

packing

coil

coil or straight

straight

cutting

easiest

easy

difficult

connection

easy

easier or easy

difficult

shock- resistance

strong

general

strong

pressure-resistance

High

general

High

corrosion-resistance

High

High

bad

bending

easy but never spring back

easy but spring back

no bending

permeability

no

oxygen diffusion

no

size stability

High

lower

High

installing

easy&no
contamination

easy

difficult&
contamination

burning-resistance

good

bad

best

working life

longest

longer or long

short

hygiene

best

good

bad