Metal Bellows Expansion Joint

• Temperature Classification: High Temperature Piping
• MPa Classfication: Ultra High Pressure Piping
• Material: Stainless Steel
• Standard: ASTM, GB, API, DIN, JIS
• Diameter: DN50-9000
• Medium: Liquid
• Cross-Section Shape: Round
• Connection Type: Welding
• Transport Package: Steel Frame, Pallet, Wooden Box
• Specification: DN50-9000
• Trademark: ZhiXing
• Origin: China

Product Description

The expansion joints

 

Stainless steel expansion joints are special devices which compensate thermal pipe expansion or contraction and absorb equipment vibration or pipe motions.
Bellows is a basic part of expansion joint and it is made by forming metal cylinder into annular corrugations. The bellows can be single or multi-ply.
The bellows properties and their flexibility depend on shape of convolutions, thickness and number of plies. Convolution geometry and the above characteristics determine the pressure resistance, bellows spring rates and all kinds of movement absorption.

 

       Single layer

     Double layers


       Multiple layers         



Materials for bellows and their temperature limits

Materials				Temperature °C
Type	EN 10027-2	Steel name	USA AISI	min.	max.
Stainless austenitic steels	1.4301	X5CrNi18-10	304	-196	550
	1.4306	X2CrNi19-11	304L	-270	550
	1.4401	X5CrNiMo17-12-2	316	-196	550
	1.4404	X2CrNiMo17-12-2	316L	-270	550
	1.4435	X5CrNiMo18-14-3		-270	550
	1.4541	X6CrNiTi18-10	321	-270	550
	1.4550	X6CrNiNb18-10	347	-196	550
	1.4571	X6CrNiMoTi17-12-2	316Ti	-270	550
Heat resistant austenitic steels	1.4828	X15CrNiSi20-12	309	-196	550
	1.4876	X10NiCrAlTi32-21 X10NiCrAlTi32-21 (H)	Incoloy 800	-196	600 (900)
Nickel alloys	2.4610	NiMo16Cr16Ti	Hastelloy C4	-196	400
	2.4816	NiCr15Fe	Inconel 600	-10 (-270)	450 (900)
	2.4856	NiCr22Mo9Nb	Inconel 625	-196 (-270)	450 (900)
	2.4360	NiCu30Fe	Monel 400	-196	425
	2.4858	NiCr21Mo	Incoloy 825	-10	540