Steel tubes according to EN 10297-1 are non-alloy and alloy seamless steel tubes for mechanical and general engineering purposes, which can be bent, crimped and similarly shaped, and are also suitable for welding operations. Steel pipe carbon steel material grade (chemical composition) E235, E275, E315, E355, C35E, C45E, etc., using hot forming or cold drawing process manufacturing.

Product Size

Outer diameter: 21.3～610mm
Wall thickness: 2.77～70.00mm
End: Flat end
Length: 3 to 12 meters or SRL, DRL, double-footed and fixed-footed

Product Packaging

External surfaces oiled or varnished/black lacquered and strapped with steel straps.

Chemical composition

	C	Mn	P	S	Si	Cr	Cu	Mo	Ni	Nb	V	Alt	Cr+Mo+Ni
	≤，%
E235	0.17	1.20	0.030	0.035	0.35
E275	0.21	1.40	0.030	0.035	0.35
E315	0.21	1.50	0.030	0.035	0.30
E355	0.22	1.60	0.030	0.035	0.55
E470	0.16-0.22	1.30-1.70	0.030	0.035	0.50					0.07	0.08-0.15	≥0.010
C22E	0.17-0.24	0.40-0.70	0.035	0.035	0.40	0.40		0.10	0.40				0.63
C35E	0.32-0.39	0.50-0.80	0.035	0.035	0.40	0.40		0.10	0.40				0.63
C45E	0.42-0.50	0.50-0.80	0.035	0.035	0.40	0.40		0.10	0.40				0.63
C60E	0.57-0.65	0.60-0.90	0.035	0.035	0.40	0.40		0.10	0.40				0.63

Product Mechanical Properties

	Delivery status	Tensile strength ≥, MPa				Yield strength ≥, MPa				Elongation after break ≥, %
	Delivery status	Wall thickness≤16mm	16＜Wall thickness≤40mm	40＜Wall thickness≤65mm	65＜Wall thickness≤80mm	Wall thickness≤16mm	16＜Wall thickness≤40mm	40＜Wall thickness≤65mm	65＜Wall thickness≤80mm	Vertical	Horizontal
E235	Rolled or normalized	360	360	360	340	235	225	215	205	25	23
E275		410	410	410	380	275	265	255	245	22	20
E315		450	450	450	420	315	305	295	280	21	19
E355		490	490	490	470	355	345	335	315	20	18
E470	Rolled	650	600			470	430			17	15
C22E	normalized	240	210	210	210	430	410	410	410	product standard
C35E		300	270	270	270	550	520	520	520
C45E		340	305	305	305	620	580	580	580
C60E		390	350	340	340	710	670	670	670
		Wall thickness≤8mm	8＜Wall thickness≤20mm	20＜Wall thickness≤50mm	50＜Wall thickness≤80mm	Wall thickness≤8mm	8＜Wall thickness≤20mm	20＜Wall thickness≤50mm	50＜Wall thickness≤80mm	Vertical	Horizontal
C22E	Hardening + Tempering	500	470	440	420	340	290	270	260	product standard
C35E		630	600	550	500	430	380	320	290
C45E		700	650	630	600	490	430	370	340
C60E		850	800	750	710	580	520	450	420

	Delivery status	20℃ impact absorption work ≥, J
		Wall thickness≤8mm		8＜Wall thickness≤20mm		20＜Wall thickness≤60mm		60＜Wall thickness≤100mm
		Vertical	Horizontal	Vertical	Horizontal	Vertical	Horizontal	Vertical	Horizontal
C22E	Hardening + Tempering	50		50	32	40	27	40	27
C35E		35		35	22	35	22	35	22
C45E		25		25	14	25	14	25	14

Application
Typically used for mechanical component manufacturing and general engineering use.

Production And Processes

We have two pipe product manufacturing bases in Yantai, Shandong Province. One of them, the General Pipe Manufacturing Base, has a history of nearly 70 years and is equipped with five hot-rolling production lines and one cold-drawing production line, with an annual production capacity of up to 500.000 tons. Leveraging our mature production processes and economies of scale, our product range encompasses over 1.000 specifications of pipe products, fully compliant with international standards such as API 5L, ASTM A106. and ASTM A333. While ensuring quality, we also offer a leading price advantage.

Our high-standard pipeline product production base has a stable production capacity of 800.000 tons, primarily producing high-grade steel products such as API 5L X100 PSL2. API 5CT Super 13Cr, and ASTM A335 P91. Our product specifications cover a wide range, with a maximum outer diameter of 20 inches, a wall thickness of up to 70 millimeters, and a single-piece length of up to 36 meters, capable of meeting the demands of steel pipes in various harsh operating conditions.

Inventory And Quality Inspection

We operate under the YANTAIPIPE brand and have established solid partnerships with a number of outstanding manufacturers of steel pipes, pipe fittings, flanges, and valves. We operate three large warehouses and processing plants in Yantai and Cangzhou ensuring a minimum inventory capacity of over 35.000 tons. We not only provide products but also offer comprehensive services such as project packaging, corrosion-resistant coatings, advanced processing, and customized solutions. Through our mature supply chain system and resource integration capabilities, we create added value for our customers from all angles, enabling us to maintain a core competitive advantage in the international market!

Customer Feedback

Qualification

Special equipment type test certificate (pressure pipeline components)

Customer visit

Shipping Packaging

International Cooperation

Our products have been widely used in major energy projects around the world. We provide services to international energy giants, including China National Petroleum Corporation, Sinopec, Shell, Total, as well as national oil companies from Kuwait, Azerbaijan, Abu Dhabi, Qatar, Algeria, and Saudi Arabia. This has allowed us to accumulate extensive experience in serving international projects.

Main Projects

We are deeply involved in major global energy projects, including the Clean Fuel Project of Kuwait National Petroleum Company (KNPC), the North Field East (NFE) LNG Project in Qatar, the multiphase flow processing station project in Hassi Messaoud, Algeria, and the modernization project of SOCAR Haor for the State Oil Company of Azerbaijan (SOCAR). We provide our clients with comprehensive solutions that cover procurement, processing, quality inspection, delivery, and after-sales service.

KNPC Clean Frue Project

Onshore LNG Facilities Of The North Field East Project

Hassi Messaoud MPS Project

SOCAR Haor Modernization Project - Package A

HDO HPC Project AG

The Natural Gas Pipeline Project of Petronas

Saudi Arabia's Jazan Integrated Gasification Combined Cycle (IGCC) Power Generation Project

Mubadala Energy Thailand Sarakhan MN112 Project

GE 9E Gas Turbine Pipeline Prefabrication Project.

FAQs

Do you require a minimum order quantity(MOQ)?

We have no minimum order quantity requirements. Even if you only need one steel pipe or one pipe fitting, we can deliver on time and provide comprehensive services. Please note that certain high-grade steel products may require temporary production scheduling, which may result in minimum order quantity requirements. For specific details, please consult our sales team.

Do you offer product samples?

Of course, we provide free samples for products priced below $1,000. You only need to cover the shipping costs. For products priced above $1,000, please contact our sales team to discuss specific fees.

How long is your shipping cycle?

For products that are in stock, we will complete the final processing, quality inspection, packaging, and other steps within two weeks and deliver them as soon as possible according to the shipping schedule. For products that need to be ordered for production, an additional 2-3 weeks of production time will be required depending on the quantity requested.

Do you offer additional quality assurance?

In addition to providing factory warranty certificates, we can also provide test reports from internationally recognized quality testing agencies such as SGS, TUV, and DNV upon customer request. We are also available to assist third-party testing agencies with process inspections and final inspections prior to shipment.

Is it possible to visit your factory?

Of course! Whether it's our own factory, processing plant, or our partners' factories, we welcome you to visit and exchange ideas at any time. If you need our assistance with visa matters, please feel free to contact our sales manager.

Are you a supplier or a manufacturer?

We are both a supplier and a manufacturer. We have three processing plants and warehouses, as well as a seamless steel pipe factory. We also collaborate closely with other outstanding steel pipe and pipe fitting factories in China, enabling us to offer a wide range of product specifications and a complete product system.

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