面積流量計 気体流量の圧力補正係数表−２（使用圧力が低い場合）

　　　　ガス用流量計で設計仕様圧力が１50kPa(G)で製作されているが
　　　　実際に流れている圧力が100kPa(G)の場合は流量の補正が必要です。
　　　　現在の指示値10m³/h(ntp)の場合の実流量は？

　　※面積流量計では設計仕様と異なる条件で流れた場合には流量の補正
　　 　が必要です、異なる条件とは「圧力」、「温度」です。

係数表使用例　表左列が「設計仕様圧力」150kPa(G)、実際の圧力100kPa(G)は
　　　　　　　　　　マイナス50kPa(G)の0.8950が補正係数となり10×0.8950 = 8.95m³/h(ntp)
　　　　　　　　　　が実流量となります。

kPa(G) 設計仕様圧力	面積流量計　圧力補正係数表−圧力減　　　　　設計仕様圧力よりマイナスkPa(G)
	-500	-450	-400	-350	-300	-250	-200	-150	-100	-75	-50	-40	-30	-20	-10	0
0	-	-	-	-	-	-	-	-	-	0.5095	0.7116	0.7779	0.8390	0.8959	0.9494	1.0000
10	-	-	-	-	-	-	-	-	-	0.5711	0.7421	0.8004	0.8547	0.9057	0.9540	1.0000
20	-	-	-	-	-	-	-	-	0.4190	0.6178	0.7667	0.8187	0.8676	0.9138	0.9579	1.0000
30	-	-	-	-	-	-	-	-	0.4882	0.6548	0.7869	0.8339	0.8784	0.9207	0.9612	1.0000
40	-	-	-	-	-	-	-	-	0.5406	0.6850	0.8038	0.8467	0.8875	0.9265	0.9640	1.0000
50	-	-	-	-	-	-	-	-	0.5823	0.7101	0.8182	0.8577	0.8954	0.9316	0.9664	1.0000
60	-	-	-	-	-	-	-	-	0.6165	0.7315	0.8307	0.8672	0.9022	0.9360	0.9685	1.0000
70	-	-	-	-	-	-	-	-	0.6452	0.7498	0.8415	0.8755	0.9082	0.9398	0.9704	1.0000
80	-	-	-	-	-	-	-	-	0.6696	0.7657	0.8510	0.8828	0.9135	0.9432	0.9720	1.0000
90	-	-	-	-	-	-	-	-	0.6908	0.7797	0.8594	0.8893	0.9182	0.9463	0.9735	1.0000
100	-	-	-	-	-	-	-	-	0.7094	0.7921	0.8670	0.8390	0.9225	0.9490	0.9748	1.0000
110	-	-	-	-	-	-	-	-	0.7258	0.8032	0.8737	0.9004	0.9263	0.9515	0.9761	1.0000
120	-	-	-	-	-	-	-	-	0.7404	0.8131	0.8798	0.9051	0.9298	0.9537	0.9771	1.0000
130	-	-	-	-	-	-	-	-	0.7534	0.8220	0.8853	0.9094	0.9329	0.9558	0.9781	1.0000
140	-	-	-	-	-	-	-	-	0.7652	0.8302	0.8904	0.9134	0.9358	0.9577	0.9791	1.0000
150	-	-	-	-	-	-	-	-	0.7759	0.8376	0.8950	0.9170	0.9384	0.9594	0.9799	1.0000
160	-	-	-	-	-	-	-	0.6526	0.7857	0.8444	0.8992	0.9203	0.9408	0.9610	0.9807	1.0000
170	-	-	-	-	-	-	-	0.6687	0.7946	0.8506	0.9032	0.9233	0.9431	0.9624	0.9814	1.0000
180	-	-	-	-	-	-	-	0.6832	0.8028	0.8564	0.9068	0.9262	0.9452	0.9638	0.9821	1.0000
190	-	-	-	-	-	-	-	0.6965	0.8104	0.8617	0.9101	0.9288	0.9471	0.9651	0.9827	1.0000
200	-	-	-	-	-	-	-	0.7086	0.8174	0.8666	0.9133	0.9313	0.9489	0.9662	0.9833	1.0000
210	-	-	-	-	-	-	0.5979	0.7198	0.8239	0.8712	0.9162	0.9335	0.9506	0.9673	0.9838	1.0000
220	-	-	-	-	-	-	0.6144	0.7302	0.8299	0.8755	0.9189	0.9357	0.9522	0.9684	0.9843	1.0000
230	-	-	-	-	-	-	0.6295	0.7398	0.8356	0.8796	0.9215	0.9377	0.9536	0.9693	0.9848	1.0000
240	-	-	-	-	-	-	0.6434	0.7487	0.8408	0.8833	0.9239	0.9396	0.9550	0.9703	0.9852	1.0000
250	-	-	-	-	-	-	0.6563	0.7570	0.8458	0.8869	0.9261	0.9413	0.9563	0.9711	0.9857	1.0000
260	-	-	-	-	-	0.5550	0.6682	0.7647	0.8504	0.8902	0.9282	0.9430	0.9576	0.9719	0.9861	1.0000
270	-	-	-	-	-	0.5716	0.6792	0.7720	0.8548	0.8933	0.9302	0.9446	0.9588	0.9727	0.9864	1.0000
280	-	-	-	-	-	0.5868	0.6895	0.7789	0.8589	0.8963	0.9321	0.9461	0.9599	0.9734	0.9868	1.0000
290	-	-	-	-	-	0.6009	0.6992	0.7853	0.8628	0.8991	0.9339	0.9475	0.9609	0.9741	0.9871	1.0000
300	-	-	-	-	-	0.6140	0.7083	0.7913	0.8665	0.9017	0.9356	0.9489	0.9619	0.9748	0.9875	1.0000
310	-	-	-	-	0.5202	0.6262	0.7168	0.7971	0.8700	0.9042	0.9372	0.9501	0.9628	0.9754	0.9878	1.0000
320	-	-	-	-	0.5366	0.6377	0.7248	0.8025	0.8733	0.9066	0.9388	0.9513	0.9637	0.9760	0.9881	1.0000
330	-	-	-	-	0.5518	0.6483	0.7323	0.8076	0.8764	0.9089	0.9403	0.9525	0.9646	0.9765	0.9883	1.0000
340	-	-	-	-	0.5659	0.6584	0.7395	0.8125	0.8794	0.9111	0.9416	0.9536	0.9654	0.9771	0.9886	1.0000
350	-	-	-	-	0.5790	0.6679	0.7462	0.8171	0.8823	0.9131	0.9430	0.9547	0.9662	0.9776	0.9889	1.0000
360	-	-	-	0.4912	0.5913	0.6768	0.7526	0.8215	0.8850	0.9151	0.9443	0.9557	0.9669	0.9781	0.9891	1.0000
370	-	-	-	0.5073	0.6029	0.6852	0.7587	0.8257	0.8876	0.9170	0.9455	0.9566	0.9676	0.9786	0.9893	1.0000
380	-	-	-	0.5223	0.6137	0.6932	0.7645	0.8297	0.8901	0.9188	0.9466	0.9575	0.9683	0.9790	0.9896	1.0000
390	-	-	-	0.5363	0.6240	0.7008	0.7700	0.8335	0.8924	0.9205	0.9477	0.9584	0.9690	0.9794	0.9898	1.0000
400	-	-	-	0.5494	0.6337	0.7080	0.7753	0.8371	0.8947	0.9222	0.9488	0.9593	0.9696	0.9798	0.9900	1.0000
410	-	-	0.4666	0.5617	0.6429	0.7149	0.7803	0.8406	0.8969	0.9238	0.9498	0.9601	0.9702	0.9802	0.9902	1.0000
420	-	-	0.4824	0.5732	0.6515	0.7214	0.7851	0.8440	0.8990	0.9253	0.9508	0.9609	0.9708	0.9806	0.9904	1.0000
430	-	-	0.4971	0.5842	0.6598	0.7276	0.7897	0.8472	0.9010	0.9267	0.9518	0.9616	0.9714	0.9810	0.9905	1.0000
440	-	-	0.5109	0.5945	0.6677	0.7336	0.7941	0.8502	0.9029	0.9281	0.9527	0.9623	0.9719	0.9814	0.9907	1.0000
450	-	-	0.5239	0.6043	0.6752	0.7393	0.7983	0.8532	0.9048	0.9295	0.9536	0.9630	0.9724	0.9817	0.9909	1.0000
460	-	0.4453	0.5361	0.6136	0.6823	0.7447	0.8023	0.8560	0.9066	0.9308	0.9544	0.9637	0.9729	0.9820	0.9911	1.0000
470	-	0.4608	0.5476	0.6224	0.6891	0.7499	0.8062	0.8587	0.9083	0.9321	0.9552	0.9644	0.9734	0.9823	0.9912	1.0000
480	-	0.4753	0.5585	0.6308	0.6956	0.7549	0.8099	0.8614	0.9099	0.9333	0.9560	0.9650	0.9739	0.9826	0.9914	1.0000
490	-	0.4888	0.5688	0.6388	0.7019	0.7597	0.8135	0.8639	0.9115	0.9344	0.9568	0.9656	0.9743	0.9829	0.9915	1.0000
500	-	0.5016	0.5786	0.6465	0.7079	0.7644	0.8169	0.8663	0.9131	0.9356	0.9575	0.9662	0.9747	0.9832	0.9916	1.0000
510	0.4267	0.5137	0.5879	0.6538	0.7136	0.7688	0.8203	0.8687	0.9146	0.9366	0.9582	0.9667	0.9752	0.9835	0.9918	1.0000
520	0.4419	0.5251	0.5968	0.6608	0.7191	0.7731	0.8235	0.8710	0.9160	0.9377	0.9589	0.9673	0.9756	0.9838	0.9919	1.0000
530	0.4561	0.5359	0.6053	0.6675	0.7244	0.7772	0.8266	0.8732	0.9174	0.9387	0.9596	0.9678	0.9760	0.9840	0.9920	1.0000
540	0.4694	0.5462	0.6134	0.6740	0.7295	0.7811	0.8295	0.8753	0.9187	0.9397	0.9602	0.9683	0.9763	0.9843	0.9922	1.0000
550	0.4820	0.5559	0.6212	0.6802	0.7344	0.7850	0.8324	0.8773	0.9200	0.9407	0.9608	0.9688	0.9767	0.9845	0.9923	1.0000
560	0.4939	0.5653	0.6286	0.6861	0.7392	0.7886	0.8352	0.8793	0.9213	0.9416	0.9615	0.9693	0.9771	0.9848	0.9924	1.0000
570	0.5052	0.5742	0.6357	0.6918	0.7437	0.7922	0.8379	0.8812	0.9225	0.9425	0.9620	0.9697	0.9774	0.9850	0.9925	1.0000
580	0.5159	0.5827	0.6426	0.6973	0.7481	0.7956	0.8405	0.8831	0.9237	0.9434	0.9626	0.9702	0.9777	0.9852	0.9926	1.0000
590	0.5260	0.5908	0.6491	0.7026	0.7524	0.7990	0.8430	0.8849	0.9248	0.9442	0.9632	0.9706	0.9781	0.9854	0.9927	1.0000
600	0.5358	0.5986	0.6555	0.7078	0.7565	0.8022	0.8455	0.8866	0.9260	0.9450	0.9637	0.9711	0.9784	0.9856	0.9928	1.0000
610	0.5450	0.6061	0.6616	0.7127	0.7604	0.8053	0.8478	0.8883	0.9270	0.9458	0.9642	0.9715	0.9787	0.9858	0.9929	1.0000
620	0.5539	0.6133	0.6674	0.7175	0.7643	0.8083	0.8501	0.8900	0.9281	0.9466	0.9647	0.9719	0.9790	0.9860	0.9930	1.0000
630	0.5624	0.6202	0.6731	0.7221	0.7680	0.8113	0.8524	0.8916	0.9291	0.9473	0.9652	0.9723	0.9793	0.9862	0.9931	1.0000
640	0.5705	0.6269	0.6785	0.7265	0.7716	0.8141	0.8545	0.8931	0.9301	0.9481	0.9657	0.9726	0.9796	0.9864	0.9932	1.0000
650	0.5783	0.6333	0.6838	0.7308	0.7750	0.8168	0.8566	0.8946	0.9311	0.9488	0.9662	0.9730	0.9798	0.9866	0.9933	1.0000
660	0.5859	0.6395	0.6889	0.7350	0.7784	0.8195	0.8587	0.8961	0.9320	0.9495	0.9666	0.9734	0.9801	0.9868	0.9934	1.0000
670	0.5931	0.6454	0.6938	0.7391	0.7817	0.8221	0.8606	0.8975	0.9329	0.9501	0.9670	0.9737	0.9804	0.9869	0.9935	1.0000
680	0.6000	0.6512	0.6986	0.7430	0.7849	0.8246	0.8626	0.8989	0.9338	0.9508	0.9675	0.9741	0.9806	0.9871	0.9936	1.0000
690	0.6067	0.6567	0.7032	0.7468	0.7880	0.8271	0.8644	0.9002	0.9347	0.9514	0.9679	0.9744	0.9809	0.9873	0.9937	1.0000
700	0.6132	0.6621	0.7077	0.7505	0.7910	0.8295	0.8663	0.9016	0.9355	0.9521	0.9683	0.9747	0.9811	0.9874	0.9937	1.0000
710	0.6194	0.6673	0.7120	0.7541	0.7939	0.8318	0.8680	0.9028	0.9363	0.9527	0.9687	0.9750	0.9813	0.9876	0.9938	1.0000
720	0.6255	0.6724	0.7162	0.7575	0.7967	0.8340	0.8698	0.9041	0.9371	0.9532	0.9691	0.9753	0.9816	0.9877	0.9939	1.0000
730	0.6313	0.6773	0.7203	0.7609	0.7994	0.8362	0.8714	0.9053	0.9379	0.9538	0.9695	0.9756	0.9818	0.9879	0.9940	1.0000
740	0.6369	0.6820	0.7243	0.7642	0.8021	0.8384	0.8731	0.9065	0.9387	0.9544	0.9698	0.9759	0.9820	0.9880	0.9940	1.0000
750	0.6424	0.6866	0.7281	0.7674	0.8047	0.8404	0.8747	0.9076	0.9394	0.9549	0.9702	0.9762	0.9822	0.9882	0.9941	1.0000
760	0.6477	0.6910	0.7318	0.7705	0.8073	0.8425	0.8762	0.9088	0.9402	0.9555	0.9705	0.9765	0.9824	0.9883	0.9942	1.0000
770	0.6528	0.6954	0.7355	0.7735	0.8097	0.8444	0.8778	0.9099	0.9409	0.9560	0.9709	0.9768	0.9826	0.9885	0.9942	1.0000
780	0.6578	0.6996	0.7390	0.7764	0.8122	0.8464	0.8792	0.9109	0.9416	0.9565	0.9712	0.9770	0.9828	0.9886	0.9943	1.0000
790	0.6626	0.7036	0.7424	0.7793	0.8145	0.8482	0.8807	0.9120	0.9422	0.9570	0.9715	0.9773	0.9830	0.9887	0.9944	1.0000
800	0.6673	0.7076	0.7458	0.7821	0.8168	0.8501	0.8821	0.9130	0.9429	0.9575	0.9719	0.9776	0.9832	0.9888	0.9944	1.0000
810	0.6718	0.7115	0.7490	0.7848	0.8190	0.8519	0.8835	0.9140	0.9435	0.9580	0.9722	0.9778	0.9834	0.9890	0.9945	1.0000
820	0.6762	0.7152	0.7522	0.7875	0.8212	0.8536	0.8848	0.9150	0.9442	0.9584	0.9725	0.9781	0.9836	0.9891	0.9946	1.0000
830	0.6805	0.7189	0.7553	0.7901	0.8233	0.8553	0.8861	0.9159	0.9448	0.9589	0.9728	0.9783	0.9838	0.9892	0.9946	1.0000
840	0.6847	0.7225	0.7583	0.7926	0.8254	0.8570	0.8874	0.9169	0.9454	0.9593	0.9731	0.9785	0.9839	0.9893	0.9947	1.0000
850	0.6888	0.7259	0.7613	0.7950	0.8274	0.8586	0.8887	0.9178	0.9460	0.9598	0.9734	0.9788	0.9841	0.9894	0.9947	1.0000
860	0.6927	0.7293	0.7641	0.7974	0.8294	0.8602	0.8899	0.9187	0.9466	0.9602	0.9736	0.9790	0.9843	0.9895	0.9948	1.0000
870	0.6966	0.7326	0.7669	0.7998	0.8313	0.8617	0.8911	0.9195	0.9471	0.9606	0.9739	0.9792	0.9844	0.9897	0.9948	1.0000
880	0.7003	0.7358	0.7697	0.8021	0.8332	0.8633	0.8923	0.9204	0.9477	0.9610	0.9742	0.9794	0.9846	0.9898	0.9949	1.0000
890	0.7040	0.7390	0.7723	0.8043	0.8351	0.8648	0.8934	0.9212	0.9482	0.9614	0.9745	0.9796	0.9848	0.9899	0.9949	1.0000
900	0.7076	0.7420	0.7749	0.8065	0.8369	0.8662	0.8946	0.9221	0.9488	0.9618	0.9747	0.9798	0.9849	0.9900	0.9950	1.0000
910	0.7110	0.7450	0.7775	0.8086	0.8387	0.8676	0.8957	0.9229	0.9493	0.9622	0.9750	0.9800	0.9851	0.9901	0.9950	1.0000
920	0.7144	0.7479	0.7800	0.8107	0.8404	0.8690	0.8968	0.9236	0.9498	0.9626	0.9752	0.9802	0.9852	0.9902	0.9951	1.0000
930	0.7178	0.7508	0.7824	0.8128	0.8421	0.8704	0.8978	0.9244	0.9503	0.9630	0.9755	0.9804	0.9853	0.9903	0.9951	1.0000
940	0.7210	0.7536	0.7848	0.8148	0.8437	0.8717	0.8989	0.9252	0.9508	0.9633	0.9757	0.9806	0.9855	0.9904	0.9952	1.0000
950	0.7242	0.7563	0.7871	0.8167	0.8454	0.8730	0.8999	0.9259	0.9513	0.9637	0.9759	0.9808	0.9856	0.9904	0.9952	1.0000
960	0.7272	0.7589	0.7894	0.8187	0.8470	0.8743	0.9009	0.9266	0.9517	0.9640	0.9762	0.9810	0.9858	0.9905	0.9953	1.0000
970	0.7303	0.7615	0.7916	0.8205	0.8485	0.8756	0.9018	0.9274	0.9522	0.9644	0.9764	0.9812	0.9859	0.9906	0.9953	1.0000
980	0.7332	0.7641	0.7938	0.8224	0.8500	0.8768	0.9028	0.9281	0.9526	0.9647	0.9766	0.9813	0.9860	0.9907	0.9954	1.0000
990	0.7361	0.7666	0.7959	0.8242	0.8515	0.8780	0.9037	0.9287	0.9531	0.9650	0.9768	0.9815	0.9862	0.9908	0.9954	1.0000
1000	0.7389	0.7690	0.7980	0.8260	0.8530	0.8792	0.9047	0.9294	0.9535	0.9653	0.9770	0.9817	0.9863	0.9909	0.9954	1.0000

本係数表は「差圧式流量計」にも適用されます。本表での「設計仕様圧力」とは目盛記載の圧力です。
温度が同時に異なる場合は　実流量＝指示流量×圧力補正係数×温度補正係数　となります。
使用圧力が設計仕様圧力も高い場合は別途用意しています。