Annular Crimp Stainless Steel Pipe Fitting (DN20-DN50)

The principle of annular crimp connection relies on the inherent rigidity of the pipe. It achieves sealing through a cylindrical filling methodusing “dual-line sealing + surface sealing.” A specialized press tool is used to simultaneously compress the locking ring and sealing cham berat the connection point, ensuring both a secure mechanical joint and a reliable seal between the pipe and fitting.

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Technical Parameters

Material	: S30408(304) / S30403(304L) / S31603(316L)
Rated Working Pressure	: Gas / Liquid=1.6MPa(Standard Type),2.5MPa(Thickened Type) Gas (Fuel)≤0.4MPa
Application Range	: Cold/hot water, drinking water, fire protection, compressed air, nitrogen & inert gases, medical gas systems
Working Temperature	: Gas -40℃~120℃ Water 0℃~100℃
Standards	: GBT-33926-2017 <Annular Crimp Stainless Steel Fittings>
	Q/74364329-3.2 <Low-pressure Fluid Annular Crimp Stainless Steel Fittings
	CECS305-2011 <Technical Code for Annular Crimp Piping Engineering>
	GB/T29038-2012 <Technical Specification for Thin-wall Stainless Steel Piping>

Grooved Cast Steel Fittings
(DN65-DN200)

Grooved connection, also known as clamp connection, features unique flexibility. A hydraulic grooving machine rolls a groove on the pipe end surface, which is sealed and locked by a gasket and clamp. This connection resists vibration and thermal expansion/contraction, and is mainly used for pipelines DN65 and above.

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Technical Parameters

Material	: QT450-12
Rated Working Pressure	: 1.6MPa,2.5MPa
Application Range	: Compressed air, nitrogen, and inert gases
Working Temperature	: -40℃~120℃
Standards (China National Standards)	: GB 5135.11-2006 <Grooved Pipe Fittings>
	GB/T8259-2008 <Technical Requirements for Flexible Clamp-type Couplings>
	GB/T 8260 <Dimensions of Flexible Clamp-type Couplings>