GOST-33259 Forged Steel Weld Neck Flange

Product Introduction

Size

NPS 1/2″-48″ DN15-DN1200

Pressure

PN16; PN25; PN40; PN63; PN100

Material

Carbon steel; Stainless Steel

Welding neck  flange is a common flange connection device with a special design of the neck, which is connected to pipelines or equipment through butt welding.

GOST-33259 is a flange standard in the Russian national standard, and the neck welded flange is a specific type of flange in the GOST-33259 standard.

The GOST-33259 standard specifies the materials, dimensions, and manufacturing process requirements for neck welded flanges. Materials usually include carbon steel, alloy steel, etc. The size standards cover aspects such as the diameter of the flange, the length of the neck, the number and diameter of bolt holes, etc.

Structural features:

1. Neck design: The prominent feature of the neck welded flange is its neck, which is a protruding and gradually thinning cylindrical structure. The design of the neck helps to improve the strength of the flange, reduce stress concentration at the connection, and make it more suitable for working under high pressure and high temperature environments.
2. Connection method: This flange is connected to the pipeline or equipment through butt welding. Welding is usually carried out at the neck of the flange and the connection point of the pipeline, forming a stable connection and forming an integrated structure between the flange and the pipeline.

Usage:

1. High pressure and high temperature environment: Neck welded flanges are mainly used to connect high-pressure and high-temperature pipeline systems, such as in industries such as petrochemicals, fertilizers, power, and shipbuilding. Its design makes it more suitable for use in challenging work environments.
2. Fluid control system: This type of flange is widely used in various fluid control systems, including oil and gas pipelines, chemical processes, water treatment, and other fields.

Materials and standards:

1. Material selection: Neck welded flanges can usually be manufactured using various materials, including carbon steel, alloy steel, stainless steel, etc. Suitable materials can be selected according to specific working environments and requirements.
2. Standard specifications: There are various international standard specifications, such as ASME, DIN, EN, etc., which specify the design, size, and manufacturing requirements for neck welded flanges.

Advantages:

1. Strong stability: The design of the neck enables the neck welded flange to have strong stability and reliability under high pressure and high temperature conditions.
2. Suitable for high demand environments: Due to its design characteristics, this type of flange is commonly used in situations where high requirements are placed on connection stability and pressure and temperature resistance.

Overall, GOST-33259 neck welded flange is a common flange type in Russia and other countries that use GOST standards, designed to be suitable for a range of high-pressure and high-temperature industrial applications.

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One of our storage

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Packing & Shipment

1.Professional manufactory.
2.Trial orders are acceptable.
3.Flexible and convenient logistic service.
4.Competitive price.
5.100% testing,ensuring the mechanical properties
6.Professional testing.

1.We can guarantee the best material according to related quotation.
2.Testing is performed on each fitting before delivery.
3.All packages are adapt for shipment .
4. Material chemical composition is conformed with international standard and environment standard.

A) How can I get more details about your products?
You can send an email to our email address. We will provide catalogue and pictures of our products for your reference.We can also supply pipe fittings, bolt and nut, gaskets etc. We aim to be your piping system solution provider. 

B) How can I get some samples?   
If you need, we will offer you samples for free, but new customers are expected to pay express charge. 

C) Do you provide customized parts? 
Yes, you can give us drawings and we will manufacture accordingly. 

D) To which country have you supplied your products?
We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru , Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.). 

E) I can’t see the goods or touch the goods, how can I deal with the risk involved?  
Our quality management system conforms to the requirement of ISO 9001:2015 verified by DNV. We are absolutely worth your trust. We can accept trial order to enhance mutual trust.