BFM® fitting spigots and connectors are available in the following diameters:
100mm (4”), 125mm (5”), 150mm (6”) up to 1,650mm (65”) (in 50mm (2”) increments)
There are some limitations on diameters for certain materials.
Choosing The Right Diameter
It's important to note that the BFM® spigot has a slightly tapered tail as this allows the spigot to be welded onto pipes that may vary slightly in diameter.
Spigot diameters for all sizes over Ø100mm are measured on the inside (ID) at the base of the tail. This means the OD (outside diameter) at the base of the tail is 4mm greater than the ID given 2mm stainless steel.
The OD at the top of the tail is 5mm greater than the base, so a 200mm spigot is 204 OD at the base of the tail and 209 OD at the top where the tail intersects with the lower seat radius.