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Steam pipelines insulation replacement in SINOPEC Beijing Company

Products：: Aerogel blanket DRT0610（10mm thickness）

Operation Conditions：: Operation temperature：540℃; Pipeline diameter：φ426×18mm; Pipeline pressure：3.6MPa; No wind indoor

Challenges：: Surface after insulation and thickness required for insulation must be reduced in order to improve indoor environment.; Thermal bridges associated with pipe racks must be stopped in order to further minimized heat loss.

Solution：: 7 layers of aerogel blanket DRT0610 with aluminum foil; Glass fiber fabric with single-face aluminum foil was applied in between every 2 layers of aerogel blanket to prevent heat leakage from the gaps.

Data Comparison：

Insulation Solution	Unit	Aluminum Silicate Wool	Aerogel Blanket
Pipeline diameter	mm	426	426
Interior liquid temperature	℃	540	540
Ambient temperature	℃	31.4	31.4
Wind speed	m/s	0	0
Thermal conductivity of insulation material	W/(m*K)	0.049	0.020
Thickness for insulation	mm	300	70
Surface temperature of insulation	℃	62.2	49.3
Heat loss after insulation	W/m	451.55	247.1
Energy conservation rate			45.3%
Plus or minus		Uneven insulation structure has already collapsed	Even insulation structure, no heat leakage from gaps

Benefits：

After replacement of aerogel, heat loss of the mid-pressure indoor steam pipelines in SINOPEC Beijing Yanshan Company was decreased by 45.3%, overall structure of the pipelines is stronger than before. A drop of 13℃ of surface temperature of insulation enhances personal safety and improves working environment.

Engineering Picture：

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