Seamless Steel Pipe, Carbon Steel Seamless Pipe, CS Seamless Pipe

Seamless steel pipes are derived from solid steel that is in sheet or bar form and is formed into a solid round shape known as “billets” which are then heated and cast over a form such as a piercing rod to create a hollow tube or shell.The abbreviation of seamless steel pipe is smls pipe.

Standards of seamless steel pipe

API SPEC 5L
Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Line Pipes	API 5L	Ø10.3~1200 x WT1.0~120	A, B, X42, X46, X52, X60, X70, X80, PSL1 / PSL2

API SPEC 5CT
Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Casing	API 5CT	Ø114~219 x WT5.2~22.2	J55, K55, N80, L80, P110
Tubing	API 5CT	Ø48.3~114.3 x WT3.2~16	J55, K55, N80, L80, P110

ASTM / ASME
Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Black and Hot-Dipped Zinc-Coated Seamless Steel Pipes	ASTM A53	Ø10.3~1200 x WT1.0~150	Gr.A, Gr.B, Gr.C
Seamless Carbon Steel Pipes for High Temperature Service	ASTM A106	Ø10.3~1200 x WT1.0~150	Gr.B, Gr.C
Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes	ASTM A179	Ø10.3~426 x WT1.0~36	Low Carbon Steel
Seamless Carbon Steel Boiler Tubes for High Pressure	ASTM A192	Ø10.3~426 x WT1.0~36	Low Carbon Steel
Seamless Cold-Drawn Intermediate Alloy Steel Heat-Exchanger and Condenser Tubes	ASTM A199	Ø10.3~426 x 1.0~36	T5, T22
Seamless Medium-Carbon Steel Boiler and Superheater Tubes	ASTM A210	Ø10.3~426 x WT1.0~36	A1, C
Seamless Ferritic & Austenitic Alloy Steel Boiler, Superheater & Heat-Exchanger Tubes	ASTM A213	Ø10.3~426 x WT1.0~36	T5, T9, T11, T12, T22, T91
Seamless Carbon and Alloy Steel for Mechanical Tubing	ASTM A333	Ø1/4"~42" x WT SCH20~XXS	Gr.1, Gr.3, Gr.6
Seamless & Welded Carbon Steel Pipes and Alloy Steel Pipes for Low Temperature Use	ASTM A334	Ø1/4"~4" x WT SCH20~SCH80	Gr.1, Gr.6
Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes	ASTM A556	Ø10.3~426 x WT1.0~36	A2, B2

DIN
Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Seamless Steel Tubes for Elevated Temperature	DIN 17175	Ø10~762 x WT1.0~120	St35.8, St45.8, 10CrMo910, 15Mo3, 13CrMo44, STPL340, STB410, STB510, WB36
Seamless Steel Tubes	DIN 1629 / DIN 2391	Ø13.5~762 x WT1.8~120	St37.0, St44.0, St52.0, St52.3
Seamless Steel Tubes	DIN 2440	Ø13.5~165.1 x WT1.8~4.85	St33.2
Seamless Steel Pipes for Structural Purpose	DIN 2393	Ø16~426 x WT1.0~36	RSt34-2, RSt37-2, RSt44-2, St52

BS
Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
Seamless Steel Tubes for Machine Structure	BS 970	Ø10~762 x WT1.0~120	Carbon Steel
Seamless Steel Tubes for Boiler and Heat Exchangers	BS 3059	Ø10~762 x WT1.0~120	360, 410, 440, 460, 490

Specification of seamless steel pipe
Out diameter: 1/2 inch - 36 inch (21.3mm-914.4mm)
Thickness: 2.11mm-60mm ( SCH10, SCH20, SCH40, SCH80, STD, SCH120, SCH160, XXS)

NOMINAL PIPE SIZE	OD(mm)	^{NOMINAL WALL THICKNESS}
DN	NB(inch)	ASME	SCH10	SCH20	SCH30	STD	SCH40	SCH60	XS	SCH80	SCH100	SCH120	SCH140	SCH160	XXS
15	1/2"	21.3	2.11		2.41	2.77	2.77		3.73	3.73				4.78	7.47
20	3/4"	26.7	2.11		2.41	2.87	2.87		3.91	3.91				5.56	7.82
25	1"	33.4	2.77		2.9	3.38	3.38		4.55	4.55				6.35	9.09
32	1.1/4"	42.2	2.77		2.97	3.56	3.56		4.85	4.85				6.35	9.7
40	1.1/2"	48.3	2.77		3.18	3.68	3.68		5.08	5.08				7.14	10.15
50	2"	60.3	2.77		3.18	3.91	3.91		5.54	5.54				8.74	11.07
65	2.1/2"	73	3.05		4.78	5.16	5.16		7.01	7.01				9.53	14.02
80	3"	88.9	3.05		4.78	5.49	5.49		7.62	7.62				11.13	15.25
90	3.1/2"	101.6	3.05		4.78	5.74	5.74		8.08	8.08
100	4"	114.3	3.05		4.78	6.02	6.02		8.56	8.56		11.13		13.49	17.12
125	5"	141.3	3.4			6.55	6.55		9.53	9.53		12.7		15.88	19.05
150	6"	168.3	3.4			7.11	7.11		10.97	10.97		14.27		18.26	21.95
200	8"	219.1	3.76	6.35	7.04	8.18	8.18	10.31	12.7	12.7	15.09	18.26	20.62	23.01	22.23
250	10"	273	4.19	6.35	7.8	9.27	9.27	12.7	12.7	15.09	18.26	21.44	25.4	28.58	25.4
300	12"	323.8	4.57	6.35	8.38	9.53	10.31	14.27	12.7	17.48	21.44	25.4	28.58	33.32	25.4
350	14"	355.6	6.35	7.92	9.53	9.53	11.13	15.09	12.7	19.05	23.83	27.79	31.75	35.71
400	16"	406.4	6.35	7.92	9.53	9.53	12.7	16.66	12.7	21.44	26.19	30.96	36.53	40.19
450	18"	457.2	6.35	7.92	11.13	9.53	14.27	19.05	12.7	23.83	39.36	34.93	39.67	45.24
500	20"	508	6.35	9.53	12.7	9.53	15.09	20.62	12.7	26.19	32.54	38.1	44.45	50.01
550	22"	558.8	6.35	9.53	12.7	9.53		22.23	12.7	28.58	34.93	41.28	47.63	53.98
600	24"	609.6	6.35	9.53	14.27	9.53	17.48	24.61	12.7	30.96	38.89	46.02	52.37	59.54
650	26"	660.4	7.92	12.7		9.53			12.7
700	28"	711.2	7.92	12.7	15.88	9.53			12.7
750	30"	762	7.92	12.7	15.88	9.53			12.7
800	32"	812.8	7.92	12.7	15.88	9.53	17.48		12.7
850	34"	863.6	7.92	12.7	15.88	9.53	17.48		12.7
900	36"	914.4	7.92	12.7	15.88	9.53	19.05		12.7

Process of seamless steel pipe
According to different manufacturing(mfg), seamless steel pipe can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe and extruded pipe.

Hot Rolled Process for Seamless Steel Pipe

Hot Rolled Process for Seamless Steel Pipe

Round Pipe Billet → Heating → Punching → Three-Roller Skew Rolling, Continuous Rolling or Extruding → Pipe Detaching →
Micro Tension Sizing or Reducing → Cooling → Straightening → Hydrostatic Test or Inspection → Marking → Warehousing

Cold Drawn Process for Seamless Steel Pipe

Cold Drawn Process for Seamless Steel Pipe

Round Pipe Billet → Heating → Punching → Pipe Head Treatment → Annealing → Acid Pickling → Coating Oil → Multi-pass Cold Drawing
→ Pipe Billet→ Heat Treatment → Straightening →Hydrostatic Test or Inspection → Marking → Warehousing

Production equipments of all process

Starting material Steel billets of various dimensions and grades, continuously cast or rolled Billet preparation Billet saws Furnace technology Billet centering	Piercing From the billet to the hollow Cross-rolling mills (cone type and barrel type piercing) Billet descaling 3-roll piercing mills Hollow inside deoxidation Cooling and quick-change systems for piercing tools	Elongating expanding From the hollow to the shell PQF® / MPM mill CPE/TPE mill / Push bench technology Assel mills, Plug mills, Hot pilger mills Elongators Rotary Expanders
Finish rolling From the shell to the tube Reheating furnace (gas fired/induction) High pressure water descaling unit Sizing mill, Stretch-reducing mill FPS adjustable rolling stands Tube layer saws	Finishing line From the rolling mill to the dispatch area Groove dressing machines for PQF® cartridges Stretch-reducing and sizing mill stands	Products Seamless tubes of various dimensions Diameters: 21.3 mm to 914.4 mm Wall thicknesses: 2.11 mm to 60 mm

NOMINAL PIPE SIZE	OD(mm)	^{NOMINAL WALL THICKNESS}
DN	NB(inch)	ASME	SCH10	SCH20	SCH30	STD	SCH40	SCH60	XS	SCH80	SCH100	SCH120	SCH140	SCH160	XXS
15	1/2"	21.3	2.11		2.41	2.77	2.77		3.73	3.73				4.78	7.47
20	3/4"	26.7	2.11		2.41	2.87	2.87		3.91	3.91				5.56	7.82
25	1"	33.4	2.77		2.9	3.38	3.38		4.55	4.55				6.35	9.09
32	1.1/4"	42.2	2.77		2.97	3.56	3.56		4.85	4.85				6.35	9.7
40	1.1/2"	48.3	2.77		3.18	3.68	3.68		5.08	5.08				7.14	10.15
50	2"	60.3	2.77		3.18	3.91	3.91		5.54	5.54				8.74	11.07
65	2.1/2"	73	3.05		4.78	5.16	5.16		7.01	7.01				9.53	14.02
80	3"	88.9	3.05		4.78	5.49	5.49		7.62	7.62				11.13	15.25
90	3.1/2"	101.6	3.05		4.78	5.74	5.74		8.08	8.08
100	4"	114.3	3.05		4.78	6.02	6.02		8.56	8.56		11.13		13.49	17.12
125	5"	141.3	3.4			6.55	6.55		9.53	9.53		12.7		15.88	19.05
150	6"	168.3	3.4			7.11	7.11		10.97	10.97		14.27		18.26	21.95
200	8"	219.1	3.76	6.35	7.04	8.18	8.18	10.31	12.7	12.7	15.09	18.26	20.62	23.01	22.23
250	10"	273	4.19	6.35	7.8	9.27	9.27	12.7	12.7	15.09	18.26	21.44	25.4	28.58	25.4
300	12"	323.8	4.57	6.35	8.38	9.53	10.31	14.27	12.7	17.48	21.44	25.4	28.58	33.32	25.4
350	14"	355.6	6.35	7.92	9.53	9.53	11.13	15.09	12.7	19.05	23.83	27.79	31.75	35.71
400	16"	406.4	6.35	7.92	9.53	9.53	12.7	16.66	12.7	21.44	26.19	30.96	36.53	40.19
450	18"	457.2	6.35	7.92	11.13	9.53	14.27	19.05	12.7	23.83	39.36	34.93	39.67	45.24
500	20"	508	6.35	9.53	12.7	9.53	15.09	20.62	12.7	26.19	32.54	38.1	44.45	50.01
550	22"	558.8	6.35	9.53	12.7	9.53		22.23	12.7	28.58	34.93	41.28	47.63	53.98
600	24"	609.6	6.35	9.53	14.27	9.53	17.48	24.61	12.7	30.96	38.89	46.02	52.37	59.54
650	26"	660.4	7.92	12.7		9.53			12.7
700	28"	711.2	7.92	12.7	15.88	9.53			12.7
750	30"	762	7.92	12.7	15.88	9.53			12.7
800	32"	812.8	7.92	12.7	15.88	9.53	17.48		12.7
850	34"	863.6	7.92	12.7	15.88	9.53	17.48		12.7
900	36"	914.4	7.92	12.7	15.88	9.53	19.05		12.7

United Arab Emirates
Pipe, Generic: Size 24 in, SCH STD，Material A106 carbon steel, Grade B,
Specification B16-25 THK B36, Bevelled Ends, Seamless Type

Saudi Arabia
14” Seamless pipe with 1” wall thickness, ASTM A53 GR.B

Chile
API 5L-Gr-B size 323.85 mm x10.31 mm x 12 meters Long PE

Brazil
3/8" PIPE ASME B36.10 BE SCH 40 SEAMLESS ASTM A106 GR.B – 6 meters

Nigeria
MATERIAL:Seamless Steel Tubes.  GRADE:A106 Gr B.
SIZES:1) 60.32mm OD X +/- 5.54mm WT
2)  168.3mm OD X +/- 7.11mm WT
A106 Gr B Seamless Steel Tubes

Morocco
Seamless Steel Pipe API 5L Grade B sch 40 with 3PE Coated pipe in polyethylene
- 400 m; size 8'' inch (DN200) ;OD=219,08mm ; WT=8,18mm ; Length=5,8M
- 100 m; size 4'' inch (DN100) ;OD=114,3mm ; WT=6,02mm ; Length=5,8M

Malaysia
Standard weight seamless steel pipes to ASTM -A53 Grade A Schedule 40.
1. 150mm seamless pipes = 1792m
2. 200mm seamless pipes = 11531m
3. 250mm Seamless pipes = 9240m
seamless pipes to ASTM -A53 Grade A Schedule 40

seamless pipes to ASTM -A53 Grade A Schedule 40

Singapore
Pipe Carbon Steel API 5L Seamless Pipe, Schedule– 40, Size– 500mm, Length– 6m each