主要性能Main Performance

具有良好的热稳定性，热氧化安定性、传热性以及较低的挥发性。L-QB最高使用温度为300℃;初馏点不低于300℃。L-QC最高使用温度为320℃，初馏点不低于320℃。L-QD可用于最高使用温度高于320℃的强制循环闭式传热系统。

Has a good thermal stability, thermal oxidation stability, as well as lower the heat and volatile. L-QB maximum use temperature of 300 ℃; early-run point of not less than 300 ℃. L-QC maximum use temperature of 320 ℃, the early-run point of not less than 320 ℃. L-QD can be used to the maximum temperature above 320 ℃ use of the mandatory closed-cycle heat transfer system.

主要用途The main purpose

适用于工业和民用热载体间接传热设备。避免与其它油品混合使用。L-QB可用于强制或非强制循环的开式或闭式传热系统，L-QC可用于强制循环的开式或闭式传热系统。L-QD可用于强制循环的闭式传热系统。

Apply to industrial and civilian use indirect heat and heat carrier equipment. Avoid the use of hybrid and other oil products. L-QB can be used for mandatory or compulsory cycle of open or closed heat transfer system, L-QC can be used for mandatory cycle of open or closed heat transfer system. L-QD can be used to force the closed-cycle heat transfer system.

执行标准The implementation of standards

SH/T 0677-1999，按最高使用温度，L-QB分为240、280、300三个牌号；L-QC分为320一个牌号；L-QD分为340、350两个牌号。

SH / T 0677-1999, the highest temperature, L-QB 240,280,300 divided into three grades; L-QC 320 into a brand; L-QD 340,350 divided into two grades.