gangtaogangyuzhibaowenwantouyouyushimaididetexing，suoyiduiyuguandaodefangshuixingnengyaoqiubijiaodeyange。gangtaogangbaowenwantouyouyuqiangdugaocaiyonghanjielianjie，fangshuidemifengxingnengkekaoxingshifengao，lingwai，qinaigaowenxingnengyeshiqitawaibaohuguansuobunengbinide。zaidixiashuiweigaodediqu，weibaozhengdixiashuibuyingxiangzhengqizhimaiguandaodezhengchangyunxing，waibaohuceng*好采用堅固、密閉的鋼管外殼。鋼套鋼保溫彎頭結構依據滑動方式不同分為：內滑動式與外滑動式。1、內滑動式：保溫結構由工作鋼管、矽酸鋁、減阻層、微孔矽酸鈣、隔熱層、不鏽鋼緊固鋼帶、鋁箔反射層、聚氨酯保溫層、外套鋼管、外防腐層組成。2、外滑動式：保溫結構由工作鋼管、玻璃棉保溫隔熱層、鋁箔反射層、不鏽鋼緊固帶、滑動導向支架、空氣保溫層、外護鋼管、外防腐層組成。鋼套鋼直埋保溫彎頭設計的彎曲半徑一般為不小於工作彎頭公稱通徑的3倍，也可根據外套彎頭自行設計。
