En10250-3 Alloy Steel Pipe Wn RF Flanges 20mnmoni4-5, T5/T9/T11 Heat-Treated 3/4" to 60" High Pressure/High Temp Applications

• Customization: Available
• Standard: ANSI, DIN, GB, JIS, GOST, BSW
• Type: Welding Flange
• Model NO.: EN 10250-3 20MnMoNi4-5
• Material: Alloy Steel
• Structure: Round
• Connection: Welding
• Sealing Surface: RF
• Manufacturing Way: Forging
• Products: Flat Blind Flanges Blind Flange, Slip on Flange
• Standard Specifications: ASTM A182, GOST 12820-80, En1092-1, DIN 2573, 2576
• Steel Grades: T12, T5, T9, T11, T17, T21, T22, T23, T24, T36, T9
• Main Process: Cold-Formed Seamless
• Unit Leagth: 5800mm-12000mm
• Annual Capacity: 120000 Metric Tons
• Section Shape: Round
• Size: 3/4"-60"
• Ends: Plain Ends
• Delivery: 7-35 Days
• Packgae: Packed by Bundles, Plastic Bags, Wooden Case,etc
• Application1: Oil/Gas Transport,Power Station,Chemical Industry
• Application2: Pipeline Transport, Boiler Pipe, Hydraulic/Automob
• Application3: Dewatering Transport,Marine Construction
• Application4: Pipeline/Pump/Valve Connection
• Transport Package: Seaworthy Package
• Specification: 3/4"-60"
• Trademark: EZ Steel
• Origin: China
• HS Code: 73043110
• Production Capacity: 500000/Year

Product Description

Product Description

EN10250-3 Alloy Steel Pipe WN RF Flanges 20MnMoNi4-5, T5/T9/T11 Heat-Treated 3/4" to 60" High Pressure/High Temp Applications

 

Product Description

Type	WeldNeck Flange, Lap Joint Flange, Threaded flange, Socket Welding Flange,    Blind Flange,  Slip on Flange
Material	Stainless steel, Alloy steel. Duplex/Super Duplex, Aluminum
Size	3/4"-60"
Pressure	150#,300#,600#.900#,1500#,2500#
Technics	Forged,
Connection	welding
Sealing surface	FF RF M F M TG  RJ
Surface treatment	Anti-rust Oil,
Producing process	Billet-cutting-forging-heating-lathe-drilling-inspection-marking-packing-export-din flange
Application Fields	Chemical Industry /Petroleum Industry /Power Industry/Metallurgical Industry Building Industry /Ship-building Industry
Supply Capacity	8000tons  per  year
Min Order Quantity	1 ton
Inspection	factory in-house self-check or Third Party inspection
PACKING	plywood cases, pallets, nylon bags or according to the customers' requirements, plastic cap
Delivery	It is generally within 25 days after receiving your payment
TRADE TERM	FOB, CNF&CFR, CIF
PAYMENT	TT or L/C
CERTIFICATES	ISO-9001/2000,PED,ABS.TUV.DNV

 

Product Overview

Our EN 10250-3 certified alloy steel pipe flanges are precision-engineered for the most demanding industrial applications. Manufactured from 20MnMoNi4-5 alloy steel and available in T5/T9/T11 heat treatment grades, these welding neck (WN) raised face (RF) flanges deliver exceptional performance in high-pressure and high-temperature environments. With sizes ranging from 3/4" to 60", they are the ideal choice for critical piping systems in oil & gas, petrochemical, and power generation industries.

 

Key Features & Benefits

 Premium Material Quality

• Made from 20MnMoNi4-5 alloy steel with superior mechanical properties

• Compliant with EN 10250-3 European standard

• Equivalent to ASTM A694 F60/F65/F70

 Optimal Heat Treatment

• Available in T5 (normalized) / T9 (quenched & tempered) / T11 (normalized & tempered) grades

• Enhanced strength and toughness for extreme conditions

• Improved resistance to creep and stress corrosion

 Superior Design & Construction

• Welding neck (WN) design for optimal stress distribution

• Raised face (RF) sealing surface ensures leak-proof connections

• Precise machining for perfect fit and alignment

 Exceptional Performance

• Pressure rating: up to PN100 (Class 600)

• Temperature range: -50°C to +550°C

• Excellent resistance to hydrogen-induced cracking (HIC)

 

Technical Specifications

Parameter	Specification
Standard	EN 10250-3
Material	20MnMoNi4-5 Alloy Steel
Heat Treatment	T5 / T9 / T11
Type	Welding Neck (WN)
Face Type	Raised Face (RF)
Size Range	3/4" to 60" (DN20 to DN1500)
Pressure Class	PN10 to PN100 (Class 150 to Class 600)
Temperature Range	-50°C to +550°C
Surface Finish	Machined, anti-rust oil coating
Certification	EN 10204 3.1/3.2, PED 2014/68/EU

 

Industrial Applications

 Oil & Gas Industry

• High-pressure pipelines

• Offshore platforms

• LNG terminals

 Petrochemical Plants

• Reactor systems

• High-temperature process piping

• Refinery equipment

 Power Generation

• Steam turbine connections

• Boiler feed systems

• Nuclear power plants

 Heavy Industry

• Chemical processing

• Mining operations

• Shipbuilding

 

Detailed Photos

 

Packaging & Shipping

 

Our Advantages

 

Certifications

 

 

 

FAQ

Q:  How many days can you deliver after confirmed the order?
A:  For stock:  within 5-7 days;
      For customized product:  around 30 days;
      For special sizes:  subject to negotiation.

Q: How does your company do quality control?
A: ISO 9001:2015 certified;
     Product certificate as per EN10204 3.1 or 3.2 as per customer's request.
    
  
Q: Can I have a factory-visit?
A:  Surely. All customers are welcome to visit us in China.

Q: Can I have a trial order?
A: Of course, it is an honor for us to have the opportunity to show our quality and service. 
 

Company Profile

	Business Type:	Manufacturer/Factory
	Main Products:	Carbon Steel Pipe , Stainless Steel Pipe , Copper Nickel Tube , Heat Exchanger Tube , Boiler ...
	Registered Capital:	2000000 RMB
	Plant Area:	>2000 square meters
	Management System Certification:	ISO 9001, ISO 14001, OHSAS/ OHSMS 18001, ANSI/ESD
	Average Lead Time:	Peak Season Lead Time: 1-3 months Off Season Lead Time: within 15 workdays

SGS Serial NO. :

QIP-ASI199413Report Verification

EZ STEEL INDUSTRIAL Co., Ltd, together with LONG-RUN METALS Co., Ltd, is the export division and window company of EZ STEEL GROUP, which was founded in 1996 and has been committed to the development and manufacturing of industrial tubes in the past 20 years. It is one of the largest steel tube manufacturing enterprise groups in China. The group possess fixed assets over 200million and more than 800 employees with annual production capacity over 300 thousand tons.

The company has continuously introduced the world advanced manufacturing equipment and now is able to produce welded and seamless steel tube, copper tube and nickle alloy tube. We also have our own coating facilities and workshops for further processing. After years of development, EZ STEEL GROUP and the affiliated enterprises have obtained many kinds of domestic and international certifications including ISO 9001 Quality Management System Certification, ISO14000 Environment Management System Certification, CE, License for Manufacture of Pressure Piping in China, etc. The company has obtained good domestic achievements and is the nominated supplier of CNPC and CNOOC. The product are exported to Southeast Asia, the Middle East and Africa, Europe, Australia, North and Latin Americas via trade companies, and are widely used in pipeline works, foundation works, steel structure works, boiler and condenser fabrication, oil refinery plant, power plant, sugar-making plant, ship-building and offshore construction projects etc.

Holding the concept of First-class Brand, First-class Service, First-class Value, EZ STEEL GROUP is aiming to build up a win-win enterprise platform for both our customers and employees.
 

CONTACT US
Contact: Rosy Xu
EZ STEEL INDUSTRIAL CO., LTD
Add: No.199,  Xiangfu Road, Yuhua Industrial Zone, Changsha City , P.R China 

Pls. do not hesitate to contact me if you have any questions!

You are warm welcomed to visit our factory!!!

Thank you for visiting our products & Looking forward to hearing from you!