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- Commodity name: SEAMLESS STEEL PIPE
Outside diameter: NPS 1/2’’-24’’/DN15 – DN600/OD21.3mm to OD610mm And hot expanded pipe size: OD230*4.08mm ~OD820*18mm Wall thickness: 1.20mm to 60.0mm Length: 5.8m-12m Material: carbon steel, low temperature carbon steel (LTCS), alloy steel, etc. Surface: bare, black painted, hot dipped galvanized, thermal insulation, 3LPE coated, epoxy coated, FBE coated, or any other coating and lining. Pipe end: plain end (PE), beveled end (BE), threaded end (THRD), grooved, flanged, etc.
SEAMLESS STEEL PIPE
SEAMLESS STEEL PIPE IS PRODUCED BY PIERCING A SOLID STEEL BILLET TO FORM A PIPE WITH EXACT SPECIFICATIONS REQUIRED. BECAUSE OF ITS UNIFORM SHAPE AND ALILITY TO WITHSTANDARD PRESSURE AND HEAT, SEAMLESS STEEL PIPE IS AN IDEAN MATERIAL FOR MANY APPLICATIONS, SUCH AS OIL CASING AND TUBING, LINE PIPES, DRILLING PIPE, BOILER PIPE, GAS CYLINDER TUBE, HYDRAULICAL PIPE, PETROCHEMICAL INDUSTRIAL PIPE, OIL, GAS, PETROLUEM, STEAM, MNING LIQUID, ETC. TRANSPORTATION PIPE, STEEL STRUCTURE, SCALLFOLDING, ETC.
SENHAI PIPELINE IS EQUIPPED WITH FOUR HOT ROLLING PRODUCTION LINES, TWO COLD DRAWING PRODUCTION LINES, BAR COLD DRAWING MACHINE, AUTOMATICALLY ROTARY HEAD ROLLING MACHINE, TUBE STRAIGHTENING MACHINE, ANNEALING FURNANCE WITH WATER COLLING SYSTEM AND AUXILIARY EQUIPMENT O SURFACE TREATMENT AND COATING.SEAMLESS STEEL PIPE MANUFACTTURING PROCESS FLOW CHART:
SMLS STEEL PIPE SPECIFICATION:
OUTSIDE DIAMETER: NPS 1/2’’-24’’/DN15 – DN600/OD21.3MM TO OD610MM,
AND HOT EXPANDED PIPE SIZE: OD230*4.08MM ~OD820*18MM
WALL THICKNESS: 1.20MM TO 60.0MM
LENGTH: 6M-12M
MATERIAL: CARBON STEEL, LOW TEMPERATURE CARBON STEEL (LTCS), ALLOY STEEL, ETC.
SURFACE: BARE, BLACK PAINTED, HOT DIPPED GALVANIZED, THERMAL INSULATION, 3LPE COATED, EPOXY COATED, FBE COATED, OR ANY OTHER COATING AND LINING.
PIPE END: PLAIN END (PE), BEVELED END (BE), THREADED END (THRD), GROOVED, FLANGED, ETC.ERW STEEL PIPE STANDARD AND STEEL GRADES:
Standard Standard Description Steel grades Size Range GB/T8163-2018 Seamless steel tubes for liquid service 10#, 20#, (GB/T699)
Q295, Q355, Q390, Q420, Q460 (GB/T1591)
OD: 6MM~610MM
WT: 0.25mm ~ 120mm (as per BG/T17395)
GB/T3087-2022 Seamless steel tubes and pipes for low and medium pressure boiler 10#, 20# OD: 6MM~610MM
WT: 0.25mm ~ 120mm (as per BG/T17395)
GB/T8162-2018 Seamless steel butes for structural purposes 10#, 20#, 25#, 35#, 45#, 20Mn, 25Mn(GB/T699)
Q295, Q355, Q390, Q420, Q460 (GB/T1591)
Alloy steel grades as GB/T3077
OD: 6MM~610MM
WT: 0.25mm ~ 120mm (as per BG/T17395)
GB/T5310-2023 Steel tubes and pipes for high pressure boiler 20G, 20MnG, 25MnG, 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG, A32128, A38078, A31120, A61158, A31108, A38108, A32088, S30409, S30489, S30989, S31009, S31059, S31089, S32169, S34779, S34770 OD: 6MM~610MM
WT: 0.25mm ~ 120mm (as per BG/T17395)
GB/T9948-2025 Seamless steel tubes and pipes for petrochemical and chemical facilities 10#, 20#, 10Mn, Q355B, Q355C, Q355D, Q355E, 12CrMo, 15CrMo, 12Cr1Mo, 12Cr1MoV, 12Cr2Mo, 12Cr5o1, 12Cr5MoNT, 12Cr9Mo1, 12Cr9MoNT, S30409, S31603, S31703, S32168, S32169, S34778, S34779 OD: 6MM~610MM
WT: 0.25mm ~ 120mm (as per BG/T17395)
GB/T9711
(ISO 3183)
Petroleum and natural gas industries-Steel pipe for pipeline transportation systems L245/B, L290/X42, L320/X46, L360/X52, L390/X56. ;L415/X60, L450/X65, L485/X70 OD: 0mm (0.405’’) ~2134mm (84’’)
WT:1.7MM(0.068’’)~52MM(2.050’’)
API 5L Specification for line pipe
(SMLS, CW, LFW, HFW, LW, SAWL, SAWH, COWL, COWH)
GR.B, X42, X46, X52, X56, X60, X65, X70,
L245, L290, L320, L360, L390, L415, L450, L485
OD: 10.30MM (0.405’’)~2134MM (84’’)
(Double-seam pipe is available if agreed with size OD≥914MM)
WT: 1.7MM (0.068’’)~52MM (2.050’’)
ASTM A53 Pipe, steel, black and hot-dipped, zinc-coated, welded and seamless (type F, type E, type S) GR.A, GR.B OD: 1/8’’ (DN6)~26’’ (DN650) 10.3MM~660MM
WT: SCH10 ~SCH.XXS
ASTM A106 Seamless carbon steel pipe for high-temperature service GR.A, GR.B, GR.C OD: 1/8’’~48’’ / DN6~DM1200 as ASME B36.10 ASTM A500 Cold-formed welded and seamless carbon steel structural tubing in round and shapes GR.B, GR.C, GR.D A periphery up to 2235mm (88’’)
WT: up to 25.4mm(1’’)
ASTM A179 Seamless cold-drawn low-carbon steel heat-exchanger and condenser tubes C 0.06-0.18% Mn 0.27-0.63% P max. 0.035% S max.0.035% T.S: min. 325MPa, Y.S: min.180MPa, EL: min.35%
OD: 3.2mm(1/8’’)~76.2mm (3’’)
Min.-wall-thk
ASTM A192 Seamless carbon steel boiler tubes for high-pressure service C 0.06-0.18% Mn 0.27-0.63% P max. 0.035% S max.0.035% Si max. 0.25% Hardness: max.137HBW T.S: min. 325MPa, Y.S: min.180MPa, EL: min.35%
OD: 12.7MM (1/2’’) TO 177.8MM (7’’)
Min.-wall-thk: 2.2MM(0.085’’)~25.4MM (1’’)
ASTM A795 Black and hot-dipped zinc-coated (galvanized) welded and smls steel pipe for fire protection use GR.A, GR.B, GR.C, GR.E, GR.D OD: 21.3mm~273.1mm
NPS1/2~NPS10/DN15~DN250
WT: Light weight & standard weight
ASTM A847 Specification for cold-formed welded and seamless high-strength, low alloy structural tubing with improved atmospheric corrosion resistance in round, square, rectangular or special shaped structural tubing Chemical composition of atmospheric corrosion-resistance steel by heat analysis, %:
C max. 0.20 Mn max. 1.35 P max. 0.04 S max.0.035 Cu min. 0.20 (if Cr and Si contents are each 0.50 min, then the copper min. do not apply)
Tensile requirements forround and shaped tubing:
T.S: min. 485MPa; Y.S: min.345Mpa; El: min19%
WELDED
OD: max. periphery of 1626mm (64’’)
WT: max. 15.9mm(0.625’’)
SEAMLESS:
OD: max. periphery of 813mm (32’’)
WT: 12.7mm (0.500’’) and less
ASTM A252 Welded and seamless steel pipe piles
(SMLS, ERW, FW, LSAW, SSAW)
GR.1, GR.2, GR.3 OD: 152.4MM (6’’)~609.6MM (24’’)
WT: 3.40MM (0.134’’)~12.70MM (0.5’’)
Or any other size and wt upon agreement
ASTM A423 SMLS and ERW low-alloy steel tubes GR.1, GR.2, GR.3 OD: 12.7mm(1/2’’)~127mm (5’’)
Min.-wall-thk: 0.9mm (0.035’’)~12.7mm (0.5’’)
Or any other size and wt upon agreement
ASME SA210 Seamless medium-carbon steel boiler and superheater tubes GR. A-1, GR.C OD: 12.7mm(1/2’’)~127mm (5’’)
Min.-wall-thk: 0.9mm (0.035’’)~12.7mm (0.5’’)
Or any other size and wt upon agreement
ASME SA213 Seamless ferritic and austenitic alloy steel boiler, superheater, and heat-exchanger tubes T2, T5, T9, T11, T12, T21, T22, T91, T92, etc. OD: 3.2mm(1/8’’) ~127mm (5’’)
WT: 0.4mm (0.015’’)~ 12.7mm(0.5’’)
ISO65 Carbon steel tubes suitable for screwing in accordance with ISO7/1 P: max. 0.06%, S: max.0.06%
T.S.: 320~520 MPa; EL: Min.15%
OD:10.2MM~165.1MM/ DN6~DN150/1/8’’~6’’
WT: Series H, M, L1, L2
JIS G3444 Carbon steel tubes for general structure (seamless, ERW, SAW,BW) STK290,STK400, STK490, STK500, STK540 OD: 21.7MM ~1016MM
WT: 2.0mm ~ 22mm
EN10210 Hot finished structural hollow sections of non-alloy and fine grain steels (seamless or welded, circular, square or rectangular, elliptical-CHS, RHS, EHS) S235JRH, S275JOH, S355JOH, S355J2H,
OD: 21.3MM ~ 1219MM
WT: 2.3MM ~ 25MM
EN10216-1/-2 Seamless steel tubes for pressure purposes P195GH, P235GH, P265GH,16Mo3, 14MoV6-3, 10CrMo5-5, 10CrMo9-10, 25CrMo4, etc. OD: 10.20MM ~711mm
WT: 1.6MM ~ 100MM
AS1074 Steel tubes and tubulars for ordinary service P: Max. 0.045%; S: max. 0.045%
C equivalent: max. 0.4 (CE=C+Mm/6
Y.S: min. 195Mpa; T.S: 320~460Mpa, EL: min. 20&
OD: DN8~DN150
WT: Series L, M, H
AN/NZS1163 Cold-formed structural steel hollow sections (ERW) C250, C350, C450, C250L0, C350L0, C450L0 CHS:610~42.4MM;
RHS: 250x150MM~50x20MM
SHS: 250x250~20x20MM
Introduce
Hebei Senhai Pipeline Co., Ltd. is one professional manufacturer of ERW, SAW, SMLS steel pipes, as per standards of ASTM, ASME, API5L, EN, BS, DIN, GOST, GB, etc. Senhai Pipeline is located in Cangzhou City, which is the famous “Hometown of Pipes and Fittings” in China, about 120km away from Tianjin Seaport and Airport, and 180km from Beijing. Senhai is so professional in producing large dia. thick wall thickness steel pipes by LSAW.
Customized Process
Goods will be strictly tested before delivery, please check carefully after receiving the goods, if there is any problem, please contact us in time.
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FAQ
What kind of company is Hebei Senhai Pipeline Co., Ltd.?
Founded in 2013 and based in Cangzhou, Hebei – China’s well-known “Hometown of Pipes and Fittings”, we are a professional manufacturer and supplier of steel pipes and pipeline accessories. Conveniently located near Tianjin Port and major transportation routes, we specialize in ERW, SAW, and seamless steel pipes, along with pipe fittings and flanges, complying with API 5L, API 5CT, ASTM, EN, GB and other international standards.
What are your main products?
Our core products include seamless steel pipes, straight seam welded pipes, large-diameter thick-wall pipes, butt-welding fittings, forged flanges, and anti-corrosion pipeline products. They are widely used in oil & gas transmission, petrochemical engineering, water supply, drainage, and construction projects.
Do you accept customized orders and what’s your MOQ?
Yes, we provide customized production for size, material grade, wall thickness, length, and anti-corrosion coating. We support small-batch trial orders and flexible MOQ to meet project-specific demands.
What quality certifications and quality control do you have?
We implement strict quality management covering raw material inspection, production process control, and finished product testing. Our products meet multiple international standards, and we issue material test certificates (MTC) to ensure stable performance under high pressure and harsh environments.
How to get a quotation and arrange delivery?
To provide an accurate quote, please send specifications, quantity, destination port, and special requirements. We offer FOB, CFR, CIF terms and cooperate with reliable logistics partners for fast, safe delivery to North America, South America, Eastern Europe, and other regions.
SEAMLESS STEEL PIPE
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