procurement of metallic expansion bellow along with ht fasteners and non metallic expansion joints fabric bolster along with fasteners for hot zone of tubular type air pre heater of unit no 1 and 2 2x210mw at sgtps mppgcl birsinghpur procurement of metallic expansion bellow along with ht fasteners and non metallic expansion joints fabric bolster along with fasteners for hot zone of tubular type air pre heater of unit no 1 and 2 2x210mw at sgtps mppgcl birsinghpur , rectangularmetallic expansion bellows with h t fasteners for air heater of ph-i duct size=9260 mm x4964 mm. bellow material- is:1079, ( gr.dd ) . bellow material thickness-3 mm. bellow profile-double corrugated. bellow edge-single miter corner. working fluid – hot air at outer profile ( opening pr 155 mmwc, temp – 264 oc ) flue gas at inner profile ( opening pr 91 mmwc, temp – 339 oc ) h t fastener hexagonal head bolt with nut ( m 12 x 35 ) 66 nos , non metallic expansion joint - ( fabric + bolster ) with fasteners for flue gas circuitof ph-i working pr.400 mmwc working temp. :-4000c. size:-length :- 15100 mm width:- 500 mm fabric: - consisting of elastomer coated glass fabric + skived virgin ptfe foil ( 0.2% ) + needled glass felt + specifically treated glass fabric. bolster:- consisting of ss wire mesh + needled glass felt + glass fabric. fasteners:- ( gi ) bolt with nut & 02 nos. washers size= m12 x 50 gi grade = 4.6 ( 800 nos. for15 m length )