Normally 100% quantity bolts ,nuts and washers are needed,50% or 25% quantity (no less than 4pcs)bolts ,nuts and washers are also available upon request.

For size smaller and equal to DN900, pressure smaller and equal to PN16 ,25% quantity bolts and nuts can afford test pressure(1.5 times of working pressure).

For size bigger than DN900 PN16, 50% or more quantity bolts are needed to achieve test pressure(1.5 times of working pressure)

Standard:comply with EN545

Flange type:EN1092-2 PN10/PN16/PN25