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一、引言1.本条件只适用于压力为25公斤/厘米~2及压力为63公斤/厘米~2中压方向控制伐的产品出厂验收,至于新产品的试制鉴定及科研性试验不包括在本条件内。2.验收项目分必检、抽检两项,必检是指每一个产品都要进行检查的项目,抽检是指每批中抽检5%,但每批(该批少于50个者)至少要抽检三个。3.压力的测量一般用普通压力表,其量程在中压应采用100公斤/厘米~2,在低压时应采用40公斤/厘米~2,精度等级宣用1.5级。4.流量的测量可用流量计或测量油箱,流量计的误差应在25%以内,用测量油箱时可用容积法或重量法。对于泄漏量的测量可用量简测量,应以接通压力15秒后马上测量的第一分钟的泄漏为准。
I. Introduction 1. This condition applies only to the pressure of 25 kg / cm ~ 2 and the pressure of 63 kg / cm ~ 2 medium-pressure directional control cutting products manufactured acceptance, as new product trial identification and research tests are not included in Within this condition. 2. Acceptance of the project points will be seized, sampling two, must seized refer to each product to be inspected items, sampling refers to sampling each batch of 5%, but each batch (batch of less than 50) at least Sampling three. 3. Pressure measurement is generally used ordinary pressure gauge, the range should be used in the medium pressure 100 kg / cm ~ 2, at low pressure should be used 40 kg / cm ~ 2, the level of accuracy declared 1.5. 4 flow measurement Available flowmeter or measuring tank, flowmeter error should be less than 25%, the volumetric method used when measuring the tank or gravimetric method. For the amount of leakage measurement can be used to measure the amount of Jane, should be connected to the pressure immediately after the first 15 seconds measured leakage prevail.