We give below the details of our enquiry for your attention: -  1a) ss expansion joint:  I) type: Metal bellow  Ii) size: 3" nominal diameter  Iii) rating: 150 lb class  Iv) axial expansion & compression compensation ( 15 mm ).  V) end fixity: Butt welded neck.  Vi) quantity: 04 no.  A. Process conditions:  Working fluid: Hydrogen gas  Working temperature range: 10 - 85 deg. C  Max. Working pressure: 150 millibar  Design temperature: Max. Permissible temperature for 150 lb class  Design pressure: Max. Permissible pressure for 150 lb class  B. Bellow specifications:  Bellow type: U-shaped, corrugated, seamless bellow  Material: Astm a-240, type 304 l  No. of ply.: Double ply.  Axial contraction: 15 mm  Axial extention: 7.5 mm each side  Preset extention: 3.0 mm (at installation temperature 35 deg.C)  Cyclic life: 5000  C. Tie rod:  No. Of tie rods: 3  Material: Stainless steel 304l  D. Control ring:  Type: 2 split ring fastened with a bolt into one piece Material:   Stainless steel 304l  E. Inner sleeve:  Material: Stainless steel 304l  F. End fixity:  Butt welded end to connect with 3" nd, schedule 40 pipes (SS 304L).  Please advise me your e-mail address so that we can send you complete   enquiry.