???????????|API SPEC 5L?????|API SPEC 5L???????????

???????????

??б????

???

??????

???(GB/T9711.1)	L175(??????)	L210	L245	L290	L320	L360	L390	L415	L450	L485	L555
???(ANSI/API Spec 5L )	A25(??????)	A	B	X42	X46	X52	X56	X60	X65	X70	X80
?漲???????Rt0.5(min)Mpa	175	210	245	290	320	360	390	415	450	485	555
???????(min)Mpa	315	335	415	415	435	460	490	520	535	570	625

??????

???	???	??????(??)								CEV(??)
		C	Si	Mn	P	S	V	Nb	Ti
API SPEC 5L GB/T9711.2	B	??0.16	??0.40	??1.10	??0.020	??0.010	??	??	??	??0.42
	X42	??0.17	??0.40	??1.20	??0.020	??0.010	??0.05	??0.05	??0.04	??0.42
	X52	??0.20	??0.45	??1.60	??0.020	??0.010	??0.10	??0.05	??0.04	??0.45
	X60	??0.21	??0.45	??1.60	??0.020	??0.010	??0.15	??0.05	??0.04	Э??
	X65	??0.16	??0.45	??1.60	??0.020	??0.010	??0.06	??0.05	??0.06	??0.45
	X70	??0.16	??0.45	??1.70	??0.020	??0.010	??0.06	??0.05	??0.06	??0.45

API SPEC 5L???????????

???? ???	?? D		??? T		????????
					???		?????????
	in	mm	in	mm	lb/ft	kg/m	lb	kg
2-3/8	2.375	60.3	0.154	3.9	3.66	5.42	1.20	0.54
	2.375	60.3	0.218	5.5	5.03	7.43	1.09	0.50
2-7/8	2.875	73.0	0.203	5.2	5.80	8.69	1.80	0.82
	2.875	73.0	0.276	7.0	7.67	11.39	1.57	0.71
3-1/2	3.500	88.9	0.216	5.5	7.58	11.31	1.80	0.82
	3.500	88.9	0.300	7.6	10.26	15.24	1.76	0.80
4	4.000	101.6	0.226	5.7	9.12	13.48	3.20	1.45
	4.000	101.6	0.318	8.1	12.52	18.68	3.00	1.36
4-1/2	4.500	114.3	0.237	6.0	10.80	16.02	4.40	2.00
	4.500	114.3	0.337	8.6	15.00	22.42	3.99	1.81
5-9/16	5.563	141.3	0.258	6.6	14.63	21.92	5.60	2.54
	5.563	141.3	0.375	9.5	20.80	30.88	4.94	2.44
6-5/8	6.625	168.3	0.280	7.1	18.99	28.22	7.20	3.27
	6.625	168.3	0.432	11.0	28.60	42.67	5.65	2.56
8-5/8	8.625	219.1	0.277	7.0	24.72	36.61	14.80	6.72
	8.625	219.1	0.322	8.2	28.58	42.65	14.00	6.36
	8.625	219.1	0.500	12.7	43.43	64.64	11.74	5.20
10-3/4	10.750	273.1	0.279	7.1	31.23	46.57	20.00	9.08
	10.750	273.1	0.307	7.8	34.27	51.03	19.20	8.72
	10.750	273.1	0.365	9.3	40.52	60.50	17.40	7.90
	10.750	273.1	0.500	12.7	54.79	81.55	15.32	6.95