BSP

British Standard Pipe (BSP) use Whitworth threads and are identifiable by its parallel thread and 60 degree internal cone on the male fittings. There is also a tapered variant (BSPT).

BSP Pressure Ratings and Torque Values

Thread size Type G Class A	Dashsize	ISO 8434-6 + NCB 174								Swepts
		Working Pressure with O-ring			Working Pressure without O-ring			Tightening Torque		Not Applicable to push in adaptors
		Mpa	bar	psi	Mpa	bar	psi	With ‘O’ ring Nm	Without ‘O’ ring Nm	Mpa	bar	psi
1/8″	-02	N/A	N/A	N/A	35	350	5075	–	10	30	300	4350
1/4″	-04	40	400	5800	35	350	5075	20	20	30	300	4350
3/8″	-06	40	400	5800	35	350	5075	35	35	30	300	4350
1/2″	-08	35	350	5075	31.5	315	4568	50	60	26	260	3770
5/8″	-10	35	350	5075	31.5	315	4568	60	70	21	210	3045
3/4″	-12	31.5	315	4568	25	250	3625	85	115	21.5	215	3120
1″	-16	25	250	3625	20	200	2900	115	140	21.5	215	3120
1 1/4″	-20	20	200	2900	16	160	2175	190	210	19	190	2755
1 1/2″	-24	16	160	2320	12.5	125	1812	240	290	17.5	175	2540
2″	-32	12.5	125	1812	8	80	1160	300	400	13	130	1885

DESIGN DETAILS AND SPECIFICATIONS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE – Whilst every effort has been made to ensure the accuracy of the information supplied herein, Burnett & Hillman cannot be held responsible for any errors or omissions (E&OE). Working pressures quoted are taken from the relevant standard and are provided as a guide only.