Carbon Steel Seamless Pipe Chart | Seamless Carbon Steel Pipe Suppliers | Seamless Carbon Steel Pipe Specifications

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Steel Pipe CHART, from 1/2 inch to 144 inch OD, structural pipe, seamless, carbon steel, welded, OD, CW, ERW, DSAW, SMLS, schedule 40, 80

Carbon Steel Pipe Sizes 1/2 through 6 NPS	Carbon Steel Pipe Sizes 20 through 34 NPS
Carbon Steel Pipe Sizes 8 through 18 NPS	Carbon Steel Pipe Sizes 36 through 144 NPS
Carbon Steel Pipes Schedule Wise
SCH 5 Pipes SCH 10 Pipes SCH 20 Pipes SCH 30 Pipes SCH 40 Pipes SCH 60 Pipes	SCH 80 Pipes SCH 100 Pipes SCH 120 Pipes SCH 140 Pipes SCH 160 Pipes

Download Pdf : Carbon Steel Sch Wise Pipes PDF, Api 5L Pipe Dimensions

We are in a position to supply CARBON STEEL SEAMLESS PIPES, manufactured by world class manufacturers in India such as MSL, ISMT, JINDAL SAW. We also import material from reputed tube mills in China.

These pipes are suitable for general engineering, piping, bending, welding, flanging and like operations. They are widely used in various industrial applications like Oil & Gas, Petroleum, Petrochemical, Chemical, Machine Building, Automobile, etc.

Size Range: 1/8” NB TO 24” NB Sch 40/80/160/XXS

Dimensional Tolerances: ANSI B 36.10

General Requirements: ASTM A 530/A 530M

Grades :
CARBON STEEL PIPES
ASTM A 106 GR.B
API 5L GR.B
ASTM A 53 GR.B

Carbon Steel Welded & Seamless Pipe

Carbon Pipe, Fittings and Flanges
Form	Welded (ERW) and Seamless
Application	Fluid, Structural
Size Range	DN15 - DN600
Grades	250, 350
Wall Thickness	Std Wt, XS
Fittings Type	Butt weld, Screwed & socket, Flanges, Black and Galvanised fittings to EN10241 (BS 1740)
Fittings Shape	Elbows, Tees, Reducers, Caps, Stub ends, Flanges (ANSI, Table E, D and H)
Processing	Cut-to-length,

The information provided is for standard stock product and does not encapsulate all available combinations. Please contact the nearest Atlas Steels sales outlet if non standard product is required and we will enquire about its availability through our global supply network of mills and stockists.

Carbon Steel Pipe Fittings and Flanges

Atlas Steels stocks a comprehensive range of pipe fittings and flanges up to DN600 as follows:

Fittings:

Butt welding
ANSI Flanges AS2129 Plate Steel Flanges Tables E, D and H
Black and Galv. Fittings to EN10241 (BS 1740)

Carbon Steel Seamless Pipe For Oil Gas Industry, Petroleum, Petrochemical, Chemical Companies

Our range of Carbon/Alloy Steel Seamless Pipes, Carbon Steel Welded Pipes, API 5L Grade B Pipe are widely acclaimed for their features such as high tensile strength, smooth internal finish and hardness. Designed with precision, these pipes are ideal for marine applications, nuclear power and fossil fuel power plants, transportation, petroleum plants and construction. These seamless alloy/carbon steel pipes, carbon welded pipes are generally developed for energy-related applications involving oil and gas drilling. Further, our range of steel alloy/carbon steel pipes can be availed in different material and dimensional specifications as per specific application .

Specifications :

Size/Range : 6mm to 323.9mm
Thickness : 0.5 mm to 12 mm
Length : Random Length 4 to 7 MTR.
Standard Fixed Length : up 28 MTR
Conditions : Hot Finish/ Cold Finish, Heat Treated & Stress Relived, Bright Annealing
Standards : ASTM A53, A106, A179, A192, A213, A210, A335G, P1, P5, P9, P11, P22, P91, T11 , T22 , T9 , T91 , A334
Radius : 1.5 D to 2 MTR. DU Bend
Grades : Carbon Steel / Alloy Steel, GR1 , GR3 , GR6

What is Pipe Schedule?

Pipe schedule is the way pipe wall thickness are mentioned. To simplify the ordering of the pipe ASME committee has developed Schedule Number which is based on modified Barlow’s wall thickness formula.

Definition of Schedule Number: The schedule number indicates approximate value of the expression 1000 x P/S where P is the service pressure and S is the allowable stress, both expressed in pounds per square inch.

You can see the pipe schedule calculation formula as below;

Schedule number = P/S

P is the service pressure in (psi)
S is the allowable stress in (psi)

So, what does schedule 40 means?

Schedule 40 is nothing but a pipe thickness designator. In simple word you can say that for given material, schedule 40 pipe can withstand a certain amount of pressure.

Now, can you tell me which is thicker schedule 40 or 80 pipe?

Schedule 80 pipe is thicker than schedule 40 pipe. Look at the above formula of schedule number, allowable stress for material at given temperature is fixed. That means with an increase in service pressure schedule number will increase which is pipe wall thickness designator.

Pipe Schedule for Stainless Steel Pipe

Cost of stainless steel pipe is much higher than carbon steel pipe. Due to corrosion resistance properties of stainless steel, advancement of high alloy stainless steel and fusion welding less thickness pipe can be work satisfactorily without fear of early failure.

To reduces the cost of material ASME has introduced different schedule number for stainless steel pipe and fittings. Under ASME B36.19 Schedule no with “S” suffix is introduced for SS pipe. Example- 10S

Standard Pipe Schedule as per ASME B36.10 and B36.19

For Carbon Steel and Wrought iron Pipe as per ASME B36.10	5, 10, 20, 30, 40, 60, 80, 100, 120, 140, 160, STD, XS, XXS
For Stainless Steel Pipe as per ASME B36.19	5S, 10S, 40S, 80S
STD (Standard) and Schedule 40 has same thickness up to NPS 10 (DN 250)
Above NPS 10 STD have a wall thickness of 3/8 in. (9.53 mm)
XS has same thickness as Schedule 80 for up to NPS 8 (DN 200)
Above NPS 8 XS have a wall thickness of ½ in. (12.5 mm)

NPS Chart (Inch)

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U
1	Nominal Pipe Size Chart - Nominal Pipe Dimension in Inches
2	Nominal in Inch	OD	5	5s	10	10s	20	30	40	40s	Std	60	80	80s	XS	100	120	140	160	XXS	Nominal in Inch
3	1/8	0.405			0.049	0.049			0.068	0.068	0.068		0.095	0.095	0.095						1/8
4	1/4	0.54			0.065	0.065			0.088	0.088	0.088		0.119	0.119	0.119						1/4
5	3/8	0.675			0.065	0.065		0.073	0.091	0.091	0.091		0.126	0.126	0.126						3/8
6	1/2	0.84	0.065	0.065	0.083	0.083		0.095	0.109	0.109	0.109		0.147	0.147	0.147				0.188	0.294	1/2
7	3/4	1.05	0.065	0.065	0.083	0.083		0.095	0.113	0.113	0.113		0.154	0.154	0.154				0.219	0.308	3/4
8	1	1.315	0.065	0.065	0.109	0.109		0.114	0.133	0.133	0.133		0.179	0.179	0.179				0.25	0.358	1
9	1 1/4	1.66	0.065	0.065	0.109	0.109		0.117	0.14	0.14	0.14		0.191	0.191	0.191				0.25	0.382	1 1/4
10	1 1/2	1.9	0.065	0.065	0.109	0.109		0.125	0.145	0.145	0.145		0.2	0.2	0.2				0.281	0.4	1 1/2
11	2	2.375	0.065	0.065	0.109	0.109		0.125	0.154	0.154	0.154		0.218	0.218	0.218				0.344	0.436	2
12	2 1/2	2.875	0.083	0.083	0.12	0.12		0.188	0.203	0.203	0.203		0.276	0.276	0.276				0.375	0.552	2 1/2
13	3	3.5	0.083	0.083	0.12	0.12		0.188	0.216	0.216	0.216		0.3	0.3	0.3				0.438	0.6	3
14	3 1/2	4	0.083	0.083	0.12	0.12		0.188	0.226	0.226	0.226		0.318	0.318	0.318					0.636	3 1/2
15	4	4.5	0.083	0.083	0.12	0.12		0.188	0.237	0.237	0.237		0.337	0.337	0.337		0.438		0.531	0.674	4
16	5	5.563	0.109	0.109	0.134	0.134			0.258	0.258	0.258		0.375	0.375	0.375		0.5		0.625	0.75	5
17	6	6.625	0.109	0.109	0.134	0.134			0.28	0.28	0.28		0.432	0.432	0.432		0.562		0.719	0.864	6
18	8	8.625	0.109	0.109	0.148	0.148	0.25	0.277	0.322	0.322	0.322	0.406	0.5	0.5	0.5	0.594	0.719	0.812	0.906	0.875	8
19	10	10.75	0.134	0.134	0.165	0.165	0.25	0.307	0.365	0.365	0.365	0.5	0.594	0.5	0.5	0.719	0.844	1	1.125	1	10
20	12	12.75	0.156	0.156	0.18	0.18	0.25	0.33	0.406	0.375	0.375	0.562	0.688	0.5	0.5	0.844	1	1.125	1.312	1	12
21	14	14	0.156	0.156	0.25	0.188	0.312	0.375	0.438	0.375	0.375	0.594	0.75	0.5	0.5	0.938	1.094	1.25	1.406		14
22	16	16	0.165	0.165	0.25	0.188	0.312	0.375	0.5	0.375	0.375	0.656	0.844	0.5	0.5	1.031	1.219	1.438	1.594		16
23	18	18	0.165	0.165	0.25	0.188	0.312	0.438	0.562	0.375	0.375	0.75	0.938	0.5	0.5	1.156	1.375	1.562	1.781		18
24	20	20	0.188	0.188	0.25	0.218	0.375	0.5	0.594	0.375	0.375	0.812	1.031	0.5	0.5	1.281	1.5	1.75	1.969		20
25	22	22	0.188	0.188	0.25	0.218	0.375	0.5			0.375	0.875	1.125		0.5	1.375	1.625	1.875	2.125		22
26	24	24	0.218	0.218	0.25	0.25	0.375	0.562	0.688	0.375	0.375	0.969	1.219	0.5	0.5	1.531	1.812	2.062	2.344		24
27	26	26			0.312		0.5				0.375				0.5
28	28	28			0.312		0.5	0.625			0.375				0.5
29	30	30	0.25	0.25	0.312	0.312	0.5	0.625			0.375				0.5
30	32	32			0.312		0.5	0.625	0.688		0.375				0.5
31	34	34			0.312		0.5	0.625	0.688		0.375				0.5
32	36	36			0.312		0.5	0.625	0.75		0.375				0.5
33	38	38									0.375				0.5
34	40	40									0.375				0.5
35	42	42									0.375				0.5
36	44	44									0.375				0.5
37	46	46									0.375				0.5
38	48	48									0.375				0.5
39	Nominal in Inch	OD	5	5s	10	10s	20	30	40	40s	Std	60	80	80s	XS	100	120	140	160	XXS	Nominal in Inch

40	ASME B36.10M-2015: Welded and Seamless Wrought Steel Pipe
41	ASME B36.19M-2004: Stainless Steel Pipe (For 5S,10S,40S and 80S)
42	Don't get confused between 3 1/2 inch nominal with 3.5 inch OD, 4" nominal with 4.000" OD

NPS Chart (SI Unit – MM)

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U
1	Nominal Pipe Size Chart - Nominal Pipe Dimension in Millimeter (mm)
2	DN in mm	OD	5	5s	10	10s	20	30	40	40s	Std	60	80	80s	XS	100	120	140	160	XXS	DN in mm
3	6	10.3			1.24	1.24			1.73	1.73	1.73		2.41	2.41	2.41
4	8	13.7			1.65	1.65			2.24	2.24	2.24		3.02	3.02	3.02
5	10	17.1			1.65	1.65		1.85	2.31	2.31	2.31		3.2	3.2	3.2
6	15	21.3	1.65	1.65	2.11	2.11		2.41	2.77	2.77	2.77		3.73	3.73	3.73				4.78	7.47
7	20	26.7	1.65	1.65	2.11	2.11		2.41	2.87	2.87	2.87		3.91	3.91	3.91				5.56	7.82
8	25	33.4	1.65	1.65	2.77	2.77		2.9	3.38	3.38	3.38		4.55	4.55	4.55				6.35	9.09
9	32	42.2	1.65	1.65	2.77	2.77		2.97	3.56	3.56	3.56		4.85	4.85	4.85				6.35	9.7
10	40	48.3	1.65	1.65	2.77	2.77		3.18	3.68	3.68	3.68		5.08	5.08	5.08				7.14	10.16
11	50	60.3	1.65	1.65	2.77	2.77		3.18	3.91	3.91	3.91		5.54	5.54	5.54				8.74	11.07
12	65	73	2.11	2.11	3.05	3.05		4.78	5.16	5.16	5.16		7.01	7.01	7.01				9.53	14.02
13	80	88.9	2.11	2.11	3.05	3.05		4.78	5.49	5.49	5.49		7.62	7.62	7.62				11.13	15.24
14	90	101.6	2.11	2.11	3.05	3.05		4.78	5.74	5.74	5.74		8.08	8.08	8.08					16.15
15	100	114.3	2.11	2.11	3.05	3.05		4.78	6.02	6.02	6.02		8.56	8.56	8.56		11.13		13.49	17.12
16	125	141.3	2.77	2.77	3.4	3.4			6.55	6.55	6.55		9.53	9.53	9.53		12.7		15.88	19.05
17	150	168.3	2.77	2.77	3.4	3.4			7.11	7.11	7.11		10.97	10.97	10.97		14.27		18.26	21.95
18	200	219.1	2.77	2.77	3.76	3.76	6.35	7.04	8.18	8.18	8.18	10.31	12.7	12.7	12.7	15.09	18.26	20.62	23.01	22.23
19	250	273	3.4	3.4	4.19	4.19	6.35	7.8	9.27	9.27	9.27	12.7	15.09	12.7	12.7	18.26	21.44	25.4	28.58	25.4
20	300	323.8	3.96	3.96	4.57	4.57	6.35	8.38	10.31	9.53	9.53	14.27	17.48	12.7	12.7	21.44	25.4	28.58	33.32	25.4
21	350	355.6	3.96	3.96	6.35	4.78	7.92	9.53	11.13	9.53	9.53	15.09	19.05	12.7	12.7	23.83	27.79	31.75	35.71
22	400	406.4	4.19	4.19	6.35	4.78	7.92	9.53	12.7	9.53	9.53	16.66	21.44	12.7	12.7	26.19	30.96	36.53	40.49
23	450	457	4.19	4.19	6.35	4.78	7.92	11.13	14.27	9.53	9.53	19.05	23.83	12.7	12.7	29.36	34.93	39.67	45.24
24	500	508	4.78	4.78	6.35	5.54	9.53	12.7	15.09	9.53	9.53	20.62	26.19	12.7	12.7	32.54	38.1	44.45	50.01
25	550	559	4.78	4.78	6.35	5.54	9.53	12.7			9.53	22.23	28.58		12.7	34.93	41.28	47.63	53.98
26	600	610	5.54	5.54	6.35	6.35	9.53	14.27	17.48	9.53	9.53	24.61	30.96	12.7	12.7	38.89	46.02	52.37	59.54
27	650	660			7.92		12.7				9.53				12.7
28	700	711			7.92		12.7	15.88			9.53				12.7
29	750	762	6.35	6.35	7.92	7.92	12.7	15.88			9.53				12.7
30	800	813			7.92		12.7	15.88	17.48		9.53				12.7
31	850	864			7.92		12.7	15.88	17.48		9.53				12.7
32	900	914			7.92		12.7	15.88	19.05		9.53				12.7
33	950	965									9.53				12.7
34	1000	1016									9.53				12.7
35	1050	1067									9.53				12.7
36	1100	1118									9.53				12.7
37	1150	1168									9.53				12.7
38	1200	1219									9.53				12.7
39	DN in mm	OD	5	5s	10	10s	20	30	40	40s	Std	60	80	80s	XS	100	120	140	160	XXS	DN in mm

40	ASME B36.10M-2015: Welded and Seamless Wrought Steel Pipe
41	ASME B36.19M-2004: Stainless Steel Pipe (For 5S,10S,40S and 80S)

Nominal Pipe Size OD

Nominal in Inch	Nominal Pipe Size OD in Inch	DN in mm	Nominal Pipe Size OD in mm
1/8	10.3	6	10.3
1/4	13.7	8	13.7
3/8	17.1	10	17.1
1/2	21.3	15	21.3
3/4	26.7	20	26.7
1	33.4	25	33.4
1.25	42.2	32	42.2
1.5	48.3	40	48.3
2	60.3	50	60.3
2.5	73	65	73
3	88.9	80	88.9
3.5	101.6	90	101.6
4	114.3	100	114.3
5	141.3	125	141.3
6	168.3	150	168.3
8	219.1	200	219.1
10	273.1	250	273.1
12	323.8	300	323.8
14	14	350	355.6
16	16	400	406.4
18	18	450	457
20	20	500	508
22	22	550	559
24	24	600	610
26	26	650	660
28	28	700	711
30	30	750	762
32	32	800	813
34	34	850	864
36	36	900	914
38	38	950	965
40	40	1000	1016
42	42	1050	1067
44	44	1100	1118
46	46	1150	1168
48	48	1200	121

You can calculate Pipe Inside Diameter (ID) with the help of Outside Diameter (OD) and Thickness of the pipe by using formula given below.

Pipe ID = [Pipe O.D. – (2×Pipe wall thickness)]

Dimension Tolerance for Carbon Steel and Stainless Steel Pipe Sizes and Schedule As per ASTM A530/A530M-12 and ASTM A999/A999M-15

Common dimension tolerances are listed in ASTM A530. However, each product has its own requirements and when given in that specification that will govern over the A530.

Description	Size	Over	Under
Weight	NPS 12 (DN 300) and under	10%	3.50%
Weight	NPS 14 (DN 350) and above (Note-1)	10%	5%
Wall Thickness
Seamless and Welded Pipe	1⁄8 to 2 ½, incl., all t/D ratios (Note-2)	20.00%	12.50%
	3 to 18 incl., t/D up to 5 % incl.	22.50%	12.50%
	3 to 18 incl., t/D > 5 %	15.00%	12.50%
	20 and larger, welded, all t/D ratios (Note-3)	17.50%	12.50%
	20 and larger, seamless, t/D up to 5 % incl.	22.50%	12.50%
	20 and larger, seamless, t/D > 5 %	15.00%	12.50%
Forged and Bored Pipe		1/8 in.(3.2mm)	Nil
Cast Pipe		1/6 in.(1.6mm)	Nil
Inside Diameter for Cast Pipe		Nil	1⁄16 in. (1.6 mm)
Outside Diameter (Note-4)
DiameterOutside	1⁄8 to 11⁄2, incl	1⁄64 in. (0.4mm)	1/32 in. (0.8mm)
	Over 1 ½ to 4, incl	1/32 in. (0.8mm)	1/32 in. (0.8mm)
	Over 4 to 8, inc	1/16 in. (1.6mm)	1/32 in. (0.8mm)
	Over 8 to 18, incl	3/32 in. (2.4mm)	1/32 in. (0.8mm)
	Over 18 to 26, incl	1/8 in. (3.2mm)	1/32 in. (0.8mm)
	Over 26 to 34, incl	5/32 in. (4.0mm)	1/32 in. (0.8mm)
	Over 34	3/8 in. (4.8mm)	1/32 in. (0.8mm)

Note-1: Pipe of NPS 4 (DN 100) and smaller may be weighed in lots; pipe in sizes larger than NPS 4 (DN 100) shall be weighed separately.
Note-2: t = Nominal wall thickness. D = Outside diameter.
Note-3: For welded pipe, the weld area shall not be limited by the over tolerance.
Note-4: For thin-wall pipe, the ovality in any one cross-section shall not exceed 1.5 % of the specified outside diameter.

Pipe Schedule Chart – Pocket Chart

A Complete Guide to Pipe Sizes and Pipe Schedule Chart

Standardization of wrought steel Pipe schedule and pipe sizes begin with mass production era. At that time pipes are available in only three sizes standard weight (STD), extra-strong (XS), and double extra-strong (XXS), based on the iron pipe size (IPS) system. Height

With modernizing of various industries and use of pipe in different pressure and temperature condition these three sizes are not sufficient to meet the requirement. This will result in the concept of the schedule number that combines wall thickness and diameter of the pipe.

In current practice, pipe size defines with two sets of number 1) Pipe bore/nominal diameter and 2) Pipe schedule which is nothing but wall thickness of the pipe.

What is Nominal Pipe Size?

Nominal pipe size (NPS) is the number that defines the size of the pipe. For example, when you say 6” pipe, the 6” is the nominal size of that pipe. It also depends on the size of the pipe. For pipe sizes, NPS 14 and above Outside Diameter is same as NPS. To understand this concept, you have to learn the way pipes are manufactured.

Manufacturing of NPS 1/8 (DN 6) to NPS 12 (DN 300) pipe is based on fixed outside diameter (OD). So, any increase in wall thickness decrease the inside diameter (ID) of the pipe and this ID of the pipe is approximately equal to the Nominal Size.

Manufacturing of NPS 14 (DN350) and above pipe OD is corresponding to the Nominal Size of a pipe. With below example, you have more clarity of the concept.

OD in Inch	OD in MM	Thickness in Inch	Thickness in mm	ID in inch	ID in mm
For NPS 2 Schedule 40 pipe
2.375	60.3	0.154	3.91	2.067	52.5
For NPS 14 Schedule 40 pipe
14	350	0.438	11.13	13.124	333.3

From the above table, you can see that for NPS 2, Pipe ID is near to pipe NPS and for NPS 14 pipe OD is same as NPS.

Pipe ID is near to pipe NPS and for NPS 14 pipe OD is same as NPS.

You can easily convert inch dimension to mm by multiplying it with 25.4 and rounding as follow;

Outside diameter above 16 inches rounded to nearest 1 mm
Outside diameter 16 inches and below rounded to nearest 0.1 mm
Pipe wall thickness are rounded to nearest 0.01 mm

What is Pipe NB (Nominal Bore)?

NPS is frequently referred as an NB (Nominal Bore). As such, there is no difference between NB and NPS. NB is also an American way to refer pipe dimensions. I have also seen that when pipe dimensions are shown in mm (DN) people refer pipe sizes in NB. So when someone says 25nb pipe or 50nb pipe basically they are talking about DN.

What is DN (Diameter Nominal) Pipe Sizes?

DN or Diameter Nominal is International designation (SI or Matric Designator) and also a European equivalent of NPS to show pipe sizes. Here, you have to note that DN shows pipe sizes differently than NPS.

2” pipe is simply mentioned as DN 50. You can get any NPS to DN by multiplying it with 25. Check the below table for easy understanding. There is no change in other dimensions when you use DN.

Nominal Pipe Size	Diameter Nominal	Nominal Pipe Size	Diameter Nominal
NPS (inches)	DN (mm)	NPS (inches)	DN (mm)
1/8	6	20	500
1/4	8	22	550
3/8	10	24	600
1/2	15	26	650
3/4	20	28	700
1	25	30	750
1 ¼	32	32	800
1 ½	40	36	900
2	50	40	1000
2 ½	65	42	1050
3	80	44	1100
3 ½	90	48	1200
4	100	52	1300
5	125	56	1400
6	150	60	1500
8	200	64	1600
10	250	68	1700
12	300	72	1800
14	350	76	1900
16	400	80	2000
18	450	Based on ASME B36.10

From this table, you can see that initially pipe size increase by ¼ than ½ and then by 1”. Form 6” to 42”, it increases by 2” step and after that in 4”.

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