AS/NZS 4327:1995 pdf free.Metal-banded flexible couplings for low-pressure applications. AS/NZS 4327 specifies requirements for metal-banded flexible couplings (referred to in this Standard as flexible couplings) either with or without metal shear rings to be used in below or above ground low-pressure pipeline systems which convey water, waste water or stormwater. AS/NZS 4327 applies to flexible couplings designed for jointed items...