Big OD seamless pipes

Leading Big O.D. Steel seamless pipes supplier in Asia

are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries.
Big OD seamless pipes dominates 65% of market share in Chinese boiler industry.
Main Customers for international market: Alstom, Bechtel, Siemens Austria, Petrobras, Doosan Heavy, Hyundai., Essar, BHEL..
Sunny Steel, as a professional steel company, is devoted to provide customers with the most competitive product of big OD seamless pipes so as to meet customers’ needs.
Large diameter steel pipe often refers to the out diameter with more than 1000mm. large diameter steel pipe use is generally more widely, generally used for large-scale pipeline projects, water gas engineering, pipe network construction of large projects.
Large diameter steel pipe production process is generally a result of these processes: heating, piercing, bending, seam, weld inside and outside welding, straightening, flat top multi-channel processes, to achieve the American Petroleum Institute standards. Large diameter steel pipe used for large multi-building among the main supporting part to do, such as a bridge piling, underwater piling, piling high-rise buildings.

Large diameter steel pipe has good adhesion, corrosion resistance, which can be resistant to acid, alkali and other chemical corrosion, non-toxic, does not rust, abrasion resistance, impact resistance, permeability, smooth pipe surface will not adhere to any substance, can reduce the transmission of resistance, large diameter steel pipe to improve traffic and transportation efficiency, reduce delivery pressure loss. Coating solvent-free, no leaking substances, and thus will not contaminate the transmission medium, thus ensuring fluid purity and hygiene at -40 ℃ to +80 ℃ range can be used alternately hot and cold cycles, aging, no cracks, which can in cold areas such harsh environments.
Standard / Specification

Alloy Seamless Pipes

We are specialized in offering precision engineered alloy steels, which are used in various engineering applications and can be availed in various grades like.
ASTM / ASME A / SA335 P5, P9, P11, P12, P22, P91, P92
EN10216-2 13CrMo4-5, 14MoV6-3, 10CrMo9-10, X10CrMoVNb9-1, 15NiCuMoNb5-6-4 (WB36)
ASTM A519 SAE 4130 / 4140

Carbon steel Seamless Pipes

Covers seamless carbon steel nominal wall pipe for high-temperature service, suitable for bending flanging and similar forming operations.
ASTM / ASME A / SA 106 GR.B/C, A/SA 333 GR.6 EN10216-2 P265GH, P355NH, API 5L GR.B / X42/ X52 / X60 / X65 / X70 / X80 PSL1 / PSL2 E355, DIN 2391 ST52 / ST52.3 / ST52.4.

Stainless seamless Pipes

is a hollow steel bar, a large number of pipes used for conveying fluids, such as oil, gas, water, gas, steam,heat exchanger,mechanical machine.
TP304/L, 316/L, 321, 31803…

Standard Size
OD: 219.1-1067 mm (8 INCH to 42 INCH)
WT: 12.7-150 mm
Production Capacity: 300,000 tons

Power generation, Boiler, Electricity, Mechanical, Shipbuilding,
Gas cylinder, Chemical, Offshore and oil service…etc.