FCI 91-1-2020应适用于旋转和线性运动控制阀。本标准不包括波纹管、隔膜和管状阀杆密封件。本标准不适用于受冲突国家或国际标准管辖的阀门。市政、州和联邦法规可能要求进行超出本标准范围的额外资格测试。本标准的试验结果只能用于预测合格压力和温度额定值范围内的泄漏情况。当控制阀暴露在不同的现场工艺条件下时，所述设计的实验室证明可能无法保证类似的结果。

FCI 91-1-2020 shall apply to rotary and linear motion control valves. Bellows, diaphragms and tubular stem seals are not covered by this standard.This standard shall not apply to valves that are governed by conflicting national or international standards.Municipal, state and federal regulations may require additional qualifications testing that is beyond the scope of this standard.The test results from this standard shall only be used to predict leakage at conditions within the qualified pressure and temperature rating.The laboratory proof of the design as described may not guarantee similar results when the control valve is exposed to different field process conditions.