tender for purchase of equipment , replacement of quartz furnace tube for existing tubular furnace or chemical vapor deposition (cvd , material - quartz high-purity synthetic fused silica (sio2 ≥99.99%) low hydroxyl (oh) content ( 50 ppm) size -80 x 85 x 1000 mml, inner diameter: 80 mm outer diameter: 85 mm, length: 1000 mml thickness: 2.5 mm, temperature - withstands up to 1200℃ operating condition it should be suitable to contain samples during high-temperature processes while allowing controlled atmospheres (air, vacuum, or gas flow). thermal stability it should be resistant to high temperatures, have good thermal stability, and provide uniform heating. chemical stability it should not react with any acids (except hydrofluoric acid and hot phosphoric acid). quality assurance 100% inspection for dimensional accuracy, bubble/impurity control, and thermal performance; provide material certification and test reports. packaging shockproof foam + hard carton + wooden case. condition the