本文探讨和介绍了蒸汽直埋敷设管道的保温及保温层厚度计算方法。
The heat preservation and calculation method for thickness layer of directly-buried steam pipes are discussed and introduced.
敷设的天然气管道表面除做防腐层外还需加入阴极保护，以延缓腐蚀速度。
NG pipeline needs to be covered with anti-corrosion layer and plus cathode protect, to delay its corrosion.
敷设的天然气管道表面除做防腐层外还需加入阴极保护，以延缓腐蚀速度。
NG pipeline needs to be covered with anti-corrosion layer and plus cathode protect, to delay its corrosion.
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