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Densen Customized 20Mn steel forging and machining Bolted Bonnet for gate valve, blind flange or bonnet flange

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Densen Customized 20Mn steel forging and machining valve bonnet  for Industrial Equipmentt

Product Description


valve bonnet


Industrial Equipment


forging +Machining


20Mn Steel

Weight Ranges


Design Support

Pro-E, UG,SolidWorks,AutoCad, PDF  

Quality Control

Material, Dimension,Performance Test,Inside defects,




Products show:




Blind Flanges are the plates used for covering and closing the ends of pipes. These have all relevant boltholes, but no centre hole. The connection of pipes, where the connecting components have flanges through which they are bolted together, is called a flange joint. Blind flanges are used to seal the ends of piping systems or pressure vessel openings.

Most commonly, blind flanges are used for testing the flow of a certain gas or liquid through a pipe or a vessel. Blind pipe flanges are popular as they allow for easy access to the inside of a pipe, in cases where work needs to be done inside the line. These are also used for high-pressure applications.

New Densen Forging provides blind flanges in all material grades, sizes, and specifications, suited to your industrial requirements. We provide blind pipe flanges with a raised face, RTJ face, or flat face, as per your needs.

New Densen Forging manufactures blind flanges in all steel material grades, such as stainless steel blind flanges, carbon blind pipe flanges, and alloy blind flanges. Our in-house tooling and manufacturing apparatus allows us to cater to your requirements promptly and cost-effectively.

We deliver blind flanges to all leading industries like pipe engineering businesses, public services and governments, waterworks, shipbuilding, power generation, pharmaceutical plants, oil refineries, and petrochemical sector.

Our blind flanges are engineered with precision using latest technologies for designing and manufacturing industrial components. We use quality raw material from suppliers who are globally acclaimed.

Get quick delivery of Blind Flanges

New Densen Forging is a leading manufacturer of blind flanges offering immediate delivery programs to its customers worldwide. We equip our blind flanges with female threads and also supply them with or without the hub as per our customer’s needs.

We provide our customers with prompt delivery services. We package our products with utmost care to prevent any damage or marring during shipping them to remote locations and far-off countries.

Quality assured Blind flanges

With New Densen Forging, quality comes along with the products you asked for. We follow industry-specific quality standards religiously, and therefore, do not allow any mistakes or faults in our products.

At New Densen Forging, the flanges and fittings are all inspected for quality at several stages of their manufacturing. We start by testing the raw material and then move on towards strict testing and quality assurance mechanisms as the products near their finishing stage.

Manufacturing industrial parts are no cake-walk. Experience matters a lot while producing these parts, and they can cost a lot if there happens to be any room for faults. Entrust us with your requirements as we have close to three decades of experience in delivering industrial parts to our customers all over the world. Our customers vouch for our services and praise us for our commitment to quality.

Join hands with a leading manufacturer of blind flanges. We can provide you with technical expertise in manufacturing at competitive prices. Contact us with your requirements today.


 Products shown herein are made to the requirements of specific customers and are illustrative of the types of manufacturing capabilities available within Densen group of companies.

Our policy is that none of these products will be sold to 3rd parties without written consent of the customers to whom the tooling, design and specifications belong.  

Company Information

Shenyang New Densen Casting and Forging Company is the sales company of Shenyang Densen Group of Companies. Features of New Densen simply summarized as below:

1. Trusted supplier of steel, iron & non-ferrous components;

2. Extensive documented quality program in place. 

3. Castings, forgings, stampings, machining, welding & fabrication services.

4. 9 related factories, over 50 joint-venture sub-contractors.

5. 25+ years of manufacturing experiences, 10+ years of exporting experience

6. 100% of products sold to overseas customers.

7. 50% of customer base is forturne 500 companies. 


Processing support

Casting Service:

Casting is a manufacturing process in which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify. 

 New Densen offers multiple investment casting, sand casting, permanent casting, die casting, low pressure casting, ESR casting, lost foam casting, etc. Material can be handled include steel, iron, non-ferrous. Single component weight range is from 0.01Kg to 150 tons separately. 



 Forging Service:

Forging is a manufacturing process involving the shaping of metal using localized compressive forces. New Densen offers open die forging, closed die forging and ring forging services. Material can be steel, iron and non-ferrous. Material can be handled include steel, iron, non-ferrous. Single component weight range is from 0.1Kg to 50,000Kgs.


Stamping Service:

Stamping (also known as punching) is the process of placing flat sheet metal in either blank or coil form into a stamping press where a tool and die surface forms the metal into a net shape.

 New Densen-XBL has more than 60 sets stamping equipments, is the designed supplier for several famous bands automotive companies, has the full ability to offer whole processes from blanking, stamping, welding, to electrostatic spraying for worldwide customers.


Welding & Fabrication Service: 

Welding Frabrication is the fabrication process of metal structures by cutting, bending, then assembling the components together through welding 

 New Densen offers manual arc welding ,laser welding and robot welding etc. UT, MPT,RT,PT all are available used for inspection, WPS &PQR (Welding Process Specification& Procedure Qualification Records) before production is available under clients’ requirement.  



Machining Service: 

Machining is any of various processes in which a piece of raw material is cut into a desired final shape and size by a controlled material-removal process. 

New Densen-XBL has more than 60 sets precision machines incl. CNC center, boring, milling, lathing, etc., and more than 300 inspection instruments incl. 3 sets CMM with grade μm. Repeated tolerance can be maintained as 0.02mm. Meanwhile awarded by certificates ISO9001-2008; ISO/TS16949. New Densen-XBL specialized in high precise machining for small-middle-big metal components. 



3rd Party Inspection


3rd Party Inspection:

New Densen worked as 3rd party inspection center besides its sister factories or sub-contractors' self inspection, Offers process inspection, random inspection and before delivedry inspection services for material, mechanical, inside defects, dimentional, pressure, load, balance, surface treatment,  visual inspection and test. Weekly project follow-up report together with pictures and videos, full quality inspection documentation available. 

New Densen also designed as 3rd party inspection representative for several customers when their products made by other suppliers. 




Densen Group
Sketches of sub-companies of Densen Group:  
Contact us



  • Q Are you a manufacturer or a trader?

    We have our own foundry ,forging factory and machinery shop located in Liaoning Province, China.
  • Q What can you do for customer?

    One Stop Service
    1).Manufacturing and supply various machinery parts.
    2). Technical analysis and design 
    3).Factory audit, on-site production supervision, in-time feedback, pre-shipment quality inspection
  • Q How could you commit the product quality?

    1) all our factories were ISO certified. 
    2) more than 50% of New Densen’s products were sold to worldwide top 500 companies 
    which located in North American, Western Europe, and Japan.
    3) New Densen’s QC engineers will do on-site supervision and before EX-work quality inspection. New Densen will issue inspection reports for customers’ approval before EX-work. New Densen will be responsible for its reports and every parts no matter how long sold to customers.
  • Q How long shall we get the quotation?

    Processing time for inquiry: 1-3 working days.