What does Pipe Schedule Mean? Pipe Size Chart and Pipe Schedule 40 thickness (PDF)

The pipe Schedule describes the pipe wall thickness. With an increase in pipe schedule number pipe thickness increases. The main function of the pipes is to carry fluid (liquid, gas, fluidized solids, slurry, mixed-phase products, etc) under pressure (internal, external, or both), therefore to sustain the fluid pressure the pipe has to be strong enough to perform its intended duty without failure.  Obviously, for pipes containing pressurized fluids the wall thickness, and by implication the pipe’s strength, is the most important parameter. The wall thickness of the Pipe is expressed by “schedules or Schedule numbers“, referred to as pipe schedules or Piping Schedules.

What is a Pipe Schedule?

The pipe Schedule or Pipe Schedule number of a Pipe is a dimensionless number that is related to Pipe Wall Thickness. The piping Schedule Number for a specific pipe size is a pipe thickness designator for that pipe size.

How to Calculate a Pipe Schedule?

Schedule Numbers for pipe size/wall thickness combinations are calculated (approximated) to get a uniform relationship equal to 1000 times the P/S (P=Design Pressure and S=Allowable Stress) expression contained in the modified Barlow formula for pipe wall thickness. The pipe schedule is abbreviated as SCH. So,

SCH=1000*(P/S)

Characteristics of Pipe Schedule

For a given pipe size and schedule the thickness of the pipe is fixed and defined in the applicable ASME standard (ASME B36.10M/ ASME B36.19M). Even though Pipe thickness can also be specified in mm or inches to the value corresponding to that specified in the ASME standard, The Schedule Numbers are strictly used as a convenient designation system while ordering piping items.

For any given pipe size and varying schedule numbers or thicknesses, its Outside Diameter (OD) remains constant and its Internal Diameter (ID) varies. With an increase in thickness, the strength increases but its ID decreases. OD is kept constant to help the support hardware design so that the same support hardware can be used for the same pipe size (varying thicknesses).

Pipe Schedule numbers can be the same for different pipe sizes but that does not mean the pipe thickness is the same. It may be the same or vary with respect to pipe sizes. For example, a 6-inch schedule 40 pipe has 7.11 mm thickness, while an 8-inch Schedule 40 pipe has 8.18 mm thickness means thickness is increasing even though both schedule 40.

Pipe Schedule Governing Standards

In the oil and gas and related downstream industries the most common standards are

• ASME B36.10 Welded and Seamless Wrought Steel Pipe, and
• ASME B36.19 Stainless Steel Pipe

What is the Nominal Pipe Size?

The size of all pipes is identified by the nominal pipe size. The manufacture of pipe NPS 1⁄8 (DN 6) to NPS 12 (DN 300), inclusive, is based on a standardized outside diameter (OD). This OD was originally selected so that a pipe with a standard OD and a wall thickness that was typical of the period would have an inside diameter (ID) approximately equal to the nominal size. Although there is no such relation between the existing standard thickness — OD and nominal size — these nominal sizes and standard ODs continue in use as ‘‘standard.’’

The manufacture of pipe NPS 14 (DN 350) and larger proceeds on the basis of an OD corresponding to the nominal size. So the OD in mm of a pipe NPS 14 or higher can easily be calculated by simply multiplying the NPS (here 14) by 25.4. But for lower sizes, the OD calculation is not so easy.

Pipe Schedule vs Pipe Size

For all pipe sizes, the outside diameter remains constant. Therefore any variation in pipe schedule i.e. wall thickness affects only the inside diameter. As the pipe schedule number increases, the wall thickness increases, and the actual bore is reduced.

• Standard (STD) is identical to SCH 40 up to NPS 10. All larger sizes of Standard (STD Schedule) have 9.53 mm wall thicknesses.
• Extra-Strong (XS) is identical to SCH 80 up to NPS 8. All larger sizes of Extra-Strong have 12.70 mm wall thicknesses.
• The double Extra Strong (XXS) wall is thicker than SCH 160 from NPS 1/8 to NPS 6, and SCH 160 is thicker than the XXS wall for NPS 8 and larger.
• With an increase in pipe thickness internal diameter of the pipe reduces as the pipe’s outer diameter remains constant.

Pipe of sizes and wall thicknesses other than those of Standard, Extra-Strong, and Double Extra-Strong, and Schedule Number were adopted from API Specification 5L.

Pipe Schedule / Pipe wall Thickness Calculation

The calculation of wall thickness varies depending on the usage of the code. All codes (B 31.3, B 31.1, IBR, B 31.4, B 31.8, nuclear code, etc.) provide equations for calculating the minimum wall thickness based on the pressure that the pipe has to withstand. The major parameters involved in thickness calculation are Design pressure, Pipe OD, and Allowable Stress at design temperature. After the calculation of minimum wall thickness, corrosion and mechanical allowances need to be added to that. After that, the actual pipe thickness is selected (immediate higher size thickness of the calculated value) from ASME code tables depending on pipe material (CS or SS).

You may be interested in the following two articles:

Pipe Thickness Calculation as per ASME B31.3
Pipeline wall thickness calculation with example

Pipe Schedule Chart: Pipe Size Chart

A pipe size chart or pipe schedule chart is a tabular representation of pipe NPS and their thicknesses with respect to various schedule numbers. The wall thickness associated with a particular schedule depends on the pipe size. Dimensions (OD, ID, Thickness, and Schedule Number) and Weights of CS and SS pipes are given in the ASME standards mentioned above.  The tables in the respective codes are dimensionally complete for all sizes and wall thicknesses within its scope, but some of the larger, heavier wall sections are beyond the capability of seamless mill production and must be obtained from forged and bored billets or other sources.

Stainless steel pipe is more often available in standard weight sizes (noted by the “S” designation, for example, “NPS SCH 10S”). However stainless steel pipe can also be available in other schedules.

Abbreviations used:

• STD – Standard,
• XS – Extra Strong,
• XXS – Double Extra Strong,

A pipe Schedule chart or pipe size chart is provided in the following table with respect to nominal pipe size and pipe thicknesses.

Nominal Pipe Size	OD (inches)	ID (Inches)	Schedules	Pipe Wall Thickness (inches)	Steel Pipe Weight (lb/ft)	OD (mm)	ID (mm)	Pipe Wall Thickness (mm)	Steel Pipe Weight (kg/m)
1/8″	0.405	0.307	10, 10S	0.049	0.1863	10.287	7.7978	1.2446	0.277244942
1/8″	0.405	0.269	40, STD, 40S	0.068	0.2447	10.287	6.8326	1.7272	0.364153716
1/8″	0.405	0.215	80, XS, 80S	0.095	0.3145	10.287	5.461	2.413	0.468027559
1/4″	0.54	0.41	10, 10S	0.065	0.3297	13.716	10.414	1.651	0.490647651
1/4″	0.54	0.364	40, STD, 40S	0.088	0.4248	13.716	9.2456	2.2352	0.632172042
1/4″	0.54	0.302	80, XS, 80S	0.119	0.5351	13.716	7.6708	3.0226	0.796316524
3/8″	0.675	0.545	10, 10S	0.065	0.4235	17.145	13.843	1.651	0.630237429
3/8″	0.675	0.493	40, STD, 40S	0.091	0.5676	17.145	12.522	2.3114	0.844681852
3/8″	0.675	0.423	80, XS, 80S	0.126	0.7388	17.145	10.744	3.2004	1.099455519
1/2″	0.84	0.674	10, 10S	0.083	0.671	21.336	17.12	2.1082	0.998558004
1/2″	0.84	0.622	40, STD, 40S	0.109	0.851	21.336	15.799	2.7686	1.266427513
1/2″	0.84	0.546	80, XS, 80S	0.147	1.088	21.336	13.868	3.7338	1.619122367
1/2″	0.84	0.466	160	0.187	1.304	21.336	11.836	4.7498	1.940565778
1/2″	0.84	0.252	XXS	0.294	1.714	21.336	6.4008	7.4676	2.550712993
3/4″	1.05	0.884	10, 10S	0.083	0.8572	26.67	22.454	2.1082	1.275654129
3/4″	1.05	0.824	40, STD, 40S	0.113	1.131	26.67	20.93	2.8702	1.683113416
3/4″	1.05	0.742	80, XS, 80S	0.154	1.474	26.67	18.847	3.9116	2.193553648
3/4″	1.05	0.614	160	0.218	1.937	26.67	15.596	5.5372	2.882573552
3/4″	1.05	0.434	XXS	0.308	2.441	26.67	11.024	7.8232	3.632608178
1″	1.315	1.097	10, 10S	0.109	1.404	33.401	27.864	2.7686	2.089382172
1″	1.315	1.049	40, STD, 40S	0.133	1.679	33.401	26.645	3.3782	2.498627255
1″	1.315	0.957	80, XS, 80S	0.179	2.172	33.401	24.308	4.5466	3.232292078
1″	1.315	0.815	160	0.25	2.844	33.401	20.701	6.35	4.232338245
1″	1.315	0.599	XXS	0.358	3.659	33.401	15.215	9.0932	5.445191856
1 1/4″	1.66	1.442	10, 10S	0.109	1.806	42.164	36.627	2.7686	2.687624076
1 1/4″	1.66	1.38	40, STD, 40S	0.14	2.273	42.164	35.052	3.556	3.382596636
1 1/4″	1.66	1.278	80, XS, 80S	0.191	2.997	42.164	32.461	4.8514	4.460027328
1 1/4″	1.66	1.16	160	0.25	3.765	42.164	29.464	6.35	5.602937234
1 1/4″	1.66	0.896	XXS	0.382	5.214	42.164	22.758	9.7028	7.759286783
1 1/2″	1.9	1.682	10, 10S	0.109	2.085	48.26	42.723	2.7686	3.102821815
1 1/2″	1.9	1.61	40, STD, 40S	0.145	2.718	48.26	40.894	3.683	4.044829589
1 1/2″	1.9	1.5	80, XS, 80S	0.2	3.631	48.26	38.1	5.08	5.403523266
1 1/2″	1.9	1.337	160	0.281	4.859	48.26	33.96	7.1374	7.230988584
1 1/2″	1.9	1.1	XXS	0.4	6.408	48.26	27.94	10.16	9.536154528
2″	2.375	2.157	10, 10S	0.109	2.638	60.325	54.788	2.7686	3.925776474
2″	2.375	2.067	40, STD, 40S	0.154	3.853	60.325	52.502	3.9116	5.733895661
2″	2.375	1.939	80, XS, 80S	0.218	5.022	60.325	49.251	5.5372	7.473559307
2″	2.375	1.689	160	0.344	7.462	60.325	42.901	8.7376	11.10467932
2″	2.375	1.503	XXS	0.436	9.029	60.325	38.176	11.0744	13.43663221
2 1/2″	2.875	2.635	10, 10S	0.12	3.531	73.025	66.929	3.048	5.254706872
2 1/2″	2.875	2.469	40, STD, 40S	0.203	5.793	73.025	62.713	5.1562	8.620933704
2 1/2″	2.875	2.323	80, XS, 80S	0.276	7.651	73.025	59.004	7.0104	11.3859423
2 1/2″	2.875	2.125	160	0.375	10.01	73.025	53.975	9.525	14.89652104
2 1/2″	2.875	1.771	XXS	0.552	13.7	73.025	44.983	14.0208	20.38784598
3″	3.5	3.26	10, 10S	0.12	4.332	88.9	82.804	3.048	6.446726188
3″	3.5	3.068	40, STD, 40S	0.216	7.576	88.9	77.927	5.4864	11.27433001
3″	3.5	2.9	80, XS, 80S	0.3	10.25	88.9	73.66	7.62	15.25368039
3″	3.5	2.624	160	0.438	14.32	88.9	66.65	11.1252	21.31050762
3″	3.5	2.3	XXS	0.6	18.58	88.9	58.42	15.24	27.65008601
3 1/2″	4	3.76	10, 10S	0.12	4.937	101.6	95.504	3.048	7.347065372
3 1/2″	4	3.548	40, STD, 40S	0.226	9.109	101.6	90.119	5.7404	13.55568533
3 1/2″	4	3.364	80, XS, 80S	0.318	12.51	101.6	85.446	8.0772	18.61693089
3 1/2″	4	2.728	XXS	0.636	22.85	101.6	69.291	16.1544	34.00454603
4″	4.5	4.26	10, 10S	0.12	5.613	114.3	108.2	3.048	8.353064195
4″	4.5	4.026	40, STD, 40S	0.237	10.79	114.3	102.26	6.0198	16.05728891
4″	4.5	3.826	80, XS, 80S	0.337	14.98	114.3	97.18	8.5598	22.29269582
4″	4.5	3.624	120	0.438	19	114.3	92.05	11.1252	28.27511486
4″	4.5	3.438	160	0.531	22.51	114.3	87.325	13.4874	33.49857029
4″	4.5	3.152	XXS	0.674	27.54	114.3	80.061	17.1196	40.98403491
4 1/2″	5	4.506	STD, 40S	0.247	12.54	127	114.45	6.2738	18.66157581
4 1/2″	5	4.29	XS, 80S	0.355	17.61	127	108.97	9.017	26.20656698
5″	5.563	5.295	10, 10S	0.134	7.77	141.3	134.49	3.4036	11.56303381
5″	5.563	5.047	40, STD, 40S	0.258	14.62	141.3	128.19	6.5532	21.7569568
5″	5.563	4.813	80, XS, 80S	0.375	20.78	141.3	122.25	9.525	30.92404667
5″	5.563	4.563	120	0.5	27.04	141.3	115.9	12.7	40.23995294
5″	5.563	4.313	160	0.625	32.96	141.3	109.55	15.875	49.04988346
5″	5.563	4.063	XXS	0.75	38.55	141.3	103.2	19.05	57.36871989
6″	6.625	6.357	10, 10S	0.134	9.29	168.275	161.47	3.4036	13.825043
6″	6.625	6.065	40, STD, 40S	0.28	18.97	168.275	154.05	7.112	28.23046994
6″	6.625	5.761	80, XS, 80S	0.432	28.57	168.275	146.33	10.9728	42.51684377
6″	6.625	5.501	120	0.562	35.39	168.275	139.73	14.2748	52.66612184
6″	6.625	5.189	160	0.719	43.35	168.275	131.8	18.2626	64.5119068
6″	6.625	4.897	XXS	0.864	53.16	168.275	124.38	21.9456	79.11079505
8″	8.625	8.329	10, 10S	0.148	13.4	219.075	211.56	3.7592	19.9413968
8″	8.625	8.125	20	0.25	22.36	219.075	206.38	6.35	33.2753457
8″	8.625	8.071	30	0.277	24.7	219.075	205	7.0358	36.75764932
8″	8.625	7.981	40, STD, 40S	0.322	28.55	219.075	202.72	8.1788	42.48708049
8″	8.625	7.813	60	0.406	35.64	219.075	198.45	10.3124	53.03816282
8″	8.625	7.625	80, XS, 80S	0.5	43.39	219.075	193.68	12.7	64.57143336
8″	8.625	7.439	100	0.594	50.95	219.075	188.95	15.0876	75.82195274
8″	8.625	7.189	120	0.719	61.71	219.075	182.6	18.2626	91.83459674
8″	8.625	7.001	140	0.812	67.76	219.075	177.83	20.6248	100.8379886
8″	8.625	6.813	160	0.906	74.79	219.075	173.05	23.0124	111.2997811
8″	8.625	6.875	XXS	0.875	72.42	219.075	174.63	22.225	107.7728325
10″	10.75	10.42	10, 10S	0.165	18.65	273.05	264.67	4.191	27.75425748
10″	10.75	10.25	20	0.25	28.04	273.05	260.35	6.35	41.72811688
10″	10.75	10.136	30	0.307	34.24	273.05	257.45	7.7978	50.95473331
10″	10.75	10.02	40, STD, 40S	0.365	40.48	273.05	254.51	9.271	60.24087629
10″	10.75	9.75	60, XS, 80S	0.5	54.74	273.05	247.65	12.7	81.46209408
10″	10.75	9.564	80	0.594	64.43	273.05	242.93	15.0876	95.88240265
10″	10.75	9.314	100	0.719	77.03	273.05	236.58	18.2626	114.6332683
10″	10.75	9.064	120	0.844	82.29	273.05	230.23	21.4376	122.4610106
10″	10.75	8.75	140, XXS	1	104.1	273.05	222.25	25.4	154.9178662
10″	10.75	8.5	160	1.125	115.6	273.05	215.9	28.575	172.0317515
12″	12.75	12.39	10, 10S	0.18	24.16	323.85	314.71	4.572	35.95404079
12″	12.75	12.25	20	0.25	33.38	323.85	311.15	6.35	49.67491232
12″	12.75	12.09	30	0.33	43.77	323.85	307.09	8.382	65.13693565
12″	12.75	12	STD, 40S	0.375	49.56	323.85	304.8	9.525	73.75340487
12″	12.75	11.938	40	0.406	53.52	323.85	303.23	10.3124	79.64653407
12″	12.75	11.75	XS, 80S	0.5	65.42	323.85	298.45	12.7	97.35568495
12″	12.75	11.626	60	0.562	73.15	323.85	295.3	14.2748	108.8591922
12″	12.75	11.376	80	0.688	88.63	323.85	288.95	17.4752	131.89597
12″	12.75	11.064	100	0.844	107.9	323.85	281.03	21.4376	160.5728891
12″	12.75	10.75	120, XXS	1	125.5	323.85	273.05	25.4	186.7645745
12″	12.75	10.5	140	1.125	136.7	323.85	266.7	28.575	203.4320106
12″	12.75	10.126	160	1.312	150.3	323.85	257.2	33.3248	223.6710402
14″	14	13.624	10S	0.188	27.73	355.6	346.05	4.7752	41.26678606
14″	14	13.5	10	0.25	36.71	355.6	342.9	6.35	54.63049824
14″	14	13.375	20	0.312	45.61	355.6	339.73	7.9248	67.8751573
14″	14	13.25	30, STD, 40S	0.375	54.57	355.6	336.55	9.525	81.20910621
14″	14	13.124	40	0.438	63.44	355.6	333.35	11.1252	94.40912035
14″	14	13	XS, 80S	0.5	72.09	355.6	330.2	12.7	107.2817384
14″	14	12.814	60	0.594	85.05	355.6	325.48	15.0876	126.5683431
14″	14	12.5	80	0.75	106.1	355.6	317.5	19.05	157.894194
14″	14	12.124	100	0.938	130.9	355.6	307.95	23.8252	194.8006597
14″	14	11.814	120	1.09	150.8	355.6	300.08	27.686	224.4151222
14″	14	11.5	140	1.25	170.2	355.6	292.1	31.75	253.2855026
14″	14	11.188	160	1.406	189.1	355.6	284.18	35.7124	281.4118011
16″	16	15.624	10S	0.188	31.75	406.4	396.85	4.7752	47.2492051
16″	16	15.5	10	0.25	42.05	406.4	393.7	6.35	62.57729368
16″	16	15.375	20	0.312	52.27	406.4	390.53	7.9248	77.78632914
16″	16	15.25	30, STD, 40S	0.375	62.58	406.4	387.35	9.525	93.12929937
16″	16	15	40, XS, 80S	0.5	82.77	406.4	381	12.7	123.1753293
16″	16	14.688	60	0.656	107.5	406.4	373.08	16.6624	159.9776236
16″	16	14.314	80	0.844	136.6	406.4	363.58	21.4376	203.2831942
16″	16	13.938	100	1.031	164.8	406.4	354.03	26.1874	245.2494173
16″	16	13.564	120	1.22	192.4	406.4	344.53	30.988	286.3227421
16″	16	13.124	140	1.438	223.6	406.4	333.35	36.5252	332.753457
16″	16	12.814	160	1.594	245.3	406.4	325.48	40.4876	365.0466145
18″	18	17.624	10S	0.188	35.76	457.2	447.65	4.7752	53.21674249
18″	18	17.5	10	0.25	47.99	457.2	444.5	6.35	71.41698748
18″	18	17.375	20	0.312	58.94	457.2	441.33	7.9248	87.71238262
18″	18	17.25	STD, 40S	0.375	70.59	457.2	438.15	9.525	105.0494925
18″	18	17.124	30	0.438	82.15	457.2	434.95	11.1252	122.2526677
18″	18	17	XS, 80S	0.5	93.45	457.2	431.8	12.7	139.0689202
18″	18	16.876	40	0.562	104.7	457.2	428.65	14.2748	155.8107645
18″	18	16.5	60	0.75	138.2	457.2	419.1	19.05	205.6642565
18″	18	16.126	80	0.938	170.9	457.2	409.6	23.8252	254.3272173
18″	18	15.688	100	1.156	208	457.2	398.48	29.3624	309.5380995
18″	18	15.25	120	1.38	244.1	457.2	387.35	35.052	363.2608178
18″	18	14.876	140	1.562	274.2	457.2	377.85	39.6748	408.0545523
18″	18	14.438	160	1.781	308.5	457.2	366.73	45.2374	459.0985755
20″	20	19.564	10S	0.218	48.05	508	496.93	5.5372	71.50627732
20″	20	19.5	10	0.25	52.73	508	495.3	6.35	78.47088456
20″	20	19.25	20, STD, 40S	0.375	78.6	508	488.95	9.525	116.9696857
20″	20	19	30, XS, 80S	0.5	104.1	508	482.6	12.7	154.9178662
20″	20	18.812	40	0.594	123.1	508	477.82	15.0876	183.192981
20″	20	18.376	60	0.812	155.4	508	466.75	20.6248	231.2606763
20″	20	17.938	80	1.031	208.9	508	455.63	26.1874	310.8774471
20″	20	17.438	100	1.281	256.1	508	442.93	32.5374	381.118785
20″	20	17	120	1.5	296.4	508	431.8	38.1	441.0917918
20″	20	16.5	140	1.75	341.1	508	419.1	44.45	507.6127199
20″	20	16.064	160	1.969	379.2	508	408.03	50.0126	564.311766
24″	24	23.5	10, 10S	0.25	63.41	609.6	596.9	6.35	94.36447544
24″	24	23.25	20, STD, 40S	0.375	96.42	609.6	590.55	9.525	143.4887671
24″	24	23	XS, 80S	0.5	125.5	609.6	584.2	12.7	186.7645745
24″	24	22.876	30	0.562	140.7	609.6	581.05	14.2748	209.3846664
24″	24	22.626	40	0.688	171.3	609.6	574.7	17.4752	254.9224829
24″	24	22.064	60	0.969	238.4	609.6	560.43	24.6126	354.7782833
24″	24	21.564	80	1.219	296.8	609.6	547.73	30.9626	441.6870574
24″	24	20.938	100	1.531	357.4	609.6	531.83	38.8874	531.8697922
24″	24	20.376	120	1.812	429.4	609.6	517.55	46.0248	639.0175958
24″	24	19.876	140	2.062	483.1	609.6	504.85	52.3748	718.9319994
24″	24	19.314	160	2.344	542.1	609.6	490.58	59.5376	806.7336719
30″	30	29.376	10, 10S	0.312	98.93	762	746.15	7.9248	147.2240586
30″	30	29.25	STD, 40S	0.375	118.65	762	742.95	9.525	176.5706515
30″	30	29	20, XS, 80S	0.5	157.53	762	736.6	12.7	234.4304655
30″	30	28.75	30	0.625	196.06	762	730.25	15.875	291.7694221
36″	36	35.376	10	0.312	118.92	914.4	898.55	7.9248	176.9724557
36″	36	35.25	STD, 40S	0.375	142.68	914.4	895.35	9.525	212.331231
36″	36	35	XS, 80S	0.5	189.57	914.4	889	12.7	282.1112381
36″	36	34.75	30	0.625	235.13	914.4	882.65	15.875	349.9119872
48″	48	47.25	STD, 40S	0.375	190.74	1219.2	1200.2	9.525	283.8523899
48″	48	47	XS, 80S	0.5	253.65	1219.2	1193.8	12.7	377.4727834

Pipe Schedule 40 Pipe Dimensions

The following table will provide an example of Schedule 40 Steel Pipe Dimensions.

Pipe NPS	Schedule No	Outside Diameter, Inches	Wall Thickness, inches	Plain End Weight, lb/ft	Outside Diameter, mm	Wall Thickness, mm	Plain End Mass, Kg/m
1/8	40/STD	0.405	0.068	0.24	10.3	1.73	0.37
1⁄4	40/STD	0.540	0.088	0.43	13.7	2.24	0.63
3⁄8	40/STD	0.675	0.091	0.57	17.1	2.31	0.84
1⁄2	40/STD	0.840	0.109	0.85	21.3	2.77	1.27
3⁄4	40/STD	1.050	0.113	1.13	26.7	2.87	1.69
1	40/STD	1.315	0.133	1.68	33.4	3.38	2.50
1-1⁄4	40/STD	1.660	0.140	2.27	42.2	3.56	3.39
1-1⁄2	40/STD	1.900	0.145	2.72	48.3	3.68	4.05
2	40/STD	2.375	0.154	3.66	60.3	3.91	5.44
2-1⁄2	40/STD	2.875	0.203	5.80	73.0	5.16	8.63
3	40/STD	3.500	0.216	7.58	88.9	5.49	11.29
4	40/STD	4.500	0.237	10.80	114.3	6.02	16.08
5	40/STD	5.563	0.258	14.63	141.3	6.55	21.77
6	40/STD	6.625	0.280	18.99	168.3	7.11	28.26
8	40/STD	8.625	0.322	28.58	219.1	8.18	42.55
10	40/STD	10.750	0.365	40.52	273.0	9.27	60.29
12	40	12.750	0.406	53.57	323.8	10.31	79.71
14	40	14.000	0.438	63.50	355.6	11.13	94.55
16	40	16.000	0.500	82.85	406.4	12.70	123.31
18	40	18.000	0.562	104.76	457	14.27	155.81
20	40	20.000	0.594	123.23	508	15.09	183.43
24	40	24.000	0.688	171.45	610	17.48	255.43
32	40	32.000	0.688	230.29	813	17.48	342.94
34	40	34.000	0.688	245.00	864	17.48	364.92
36	40	36.000	0.750	282.62	914	19.05	420.45