Joint Comparisons

An overview of the joints Steel Mains can supply with Mild Steel Pipe can be seen in the table below.

	RUBBER RING JOINT	RUBBER RING JOINT	RUBBER RING JOINT	WELDED	WELDED	WELDED
	UNRESTRAINED	RESTRAINED	RESTRAINED	RESTRAINED	RESTRAINED	RESTRAINED
	SINTAJOINT	SINTALOCK I	SINTALOCK II	SPHERICAL SLIP IN JOINT	BALL & SOCKET JOINT	BUTT / PLAIN END
SIZES AVAILABLE	324 - 1829 OD	324 - 1422 OD	508 - 1829 OD	168 - 1422 OD	914 - 1981 OD	All Sizes
WALL THICKNESS	Up to 16mm	Up to 10mm	Up to 12mm	Up to 11mm	Up to 20mm	Up to 25mm
PRESSURE RATING	Up to PN42	Up to PN25	Up to PN35	Up to PN70	Up to PN50	Up to PN70
JOINT DELFECTION	Up to 3°	1.1°	1.1°	Up to 3°	3°	Zero
JOINT WELDING	Not Applicable	External only	External Only	External only to 813, Internal / External >813	Internal / External	External only to 813, Internal / External >813
ADVANTAGES	No Welding, Fast Laying Rates, Full Internal Protection	Fully Restrained, No internal welding, No cement Reinstatement, Full joint internal protection, pneumatic joint testing	Fully Restrained, No internal welding, No cement Reinstatement, Full joint internal protection, pneumatic joint testing	Fully Restrained, Full Pipe pressure, Full Axial Restraint	Permits internal & external fillet weld for all sizes, Enables pneumatic field testing of joint, Full axial restraint—reducing requirement for concrete thrust restraint	External and internal fillet weld —where entry permits , Enables pneumatic field testing of joint—if internally welded - Full axial restraint—reducing requirement for concrete thrust restraint
FULL FITTINGS SYSTEM	YES	YES	YES	YES	YES	YES
USE FOR POTABLE WATER	YES	YES	YES	YES	YES	YES
USE FOR AGGRESSIVE FLUIDS WITH CAC LINING	YES	YES	YES	Above 813 OD	YES	YES

Joint Comparison Brochures

Rubber Ring Joints Sintajoint & Sintalock - Comparison Brochure

Welded Joints Comparison Brochure