... insulation tubewall thickness of insulation tube1/4”+3/8”6.35×0.8+9.52×0.8φ8+φ ... 188mm+8mm3/8”+3/4”9.52×0.8+19.05×1.0φ12+φ228mm+8mm1/2”+3/ ... 4”12.70×0.8+19.05×1.0φ14+φ228mm+8mm 2.General ... 12+φ188mm+8mm3/8”+3/4”9.52×0.6+19.05×0.9φ12+φ228mm+8mm1/2”+3/4 ... ”12.70×0.6+19.05×0.9φ14+φ228mm+8mm Note:1. O ... Φ12.7mm(1/2”) , Φ15.88mm(5/8”) , Φ19.05mm(3/4”),two end of 3M-8M copper tube ...