Forged Seam Fillet Weld Flat Neck Welding Flange

Description

The full name of the neck flat welding flange is the neck flat welding steel pipe flange, which extends the steel pipe, pipe fittings, etc. Into the flange and connects with the equipment or pipeline through the fillet weld.
The main differences between the butt welding flange and the flat welding flange are different weld forms, different materials, different nominal pressures and different connection methods.Different weld forms: the flat weld cannot be radiographed, while the butt weld can.
The form of welding seam between the pipe with neck flat welding flange and the flange is fillet weld, while the form of welding seam between the flange with neck flat welding and the pipe is circumferential weld. The form of flat welding is two fillet weld, and the form of butt welding is one butt circumferential weld.

Specification

1. The difference between the neck flat welding flange and the neck free flat welding flange is that the neck flat welding flange is more than the neck free flat welding flange in the pipeline welding position.
2. The neck free flat welding flange is also a flat flange, and the boss without flange is also a flat fillet weld.
3. The weld joint between the neck butt welding flange and the connecting pipe belongs to class B seam, and the weld joint between the neck flat welding flange and the connecting pipe belongs to class C seam. The NDT after welding is different.
4. Different materials: the material of welding flange with neck is machined from ordinary steel plate with thickness meeting the requirements, while the material of welding flange with neck is mostly machined from forged steel parts.
5. Different nominal pressure: the nominal pressure of flat welding flange with neck is 0.6-4.0mpa, while the nominal pressure of flat welding flange with neck is 1-25mpa.
6. Obviously, the applicable pressure level of flat welding flange with neck is lower.

Characteristic

1. Different connection methods: the biggest difference between the neck flat welding flange and the neck butt welding flange in structure lies in the connection method between the nozzle and the flange.
2. Generally, the neck flat welding flange is the fillet connection between the nozzle and the flange, while the neck butt welding flange is the butt joint between the flange and the nozzle.
3. The sealing surface forms of welding flange with neck are: RF, FM, m, t, G and FF. Diameter range of flat welding flange with neck: dn10 ~ DN600.
4. Scope of application: PN series pn2.5 ~ PN40; class series class150 ~ class1500.
5. Flange material: carbon steel, Luomo steel, 304, 316, 304L, 316L, 321, 347, cf8c.

Advantage and Disadvantage

1, Advantages: the neck flat welding flange also belongs to the flat welding flange, because it has a short neck, thus improving the strength of the flange and improving the bearing strength of the flange. So it can be used on pipes with higher pressure.
2, Disadvantages: compared with plate type flat welding flange, the cost is higher, because of its shape characteristics, it is easier to bump during transportation.

Application

1, The welding flange with neck is used for corrosion-resistant, highly toxic, flammable and explosive occasions.
2, The sealing surface of flat welding flange with neck can be convex, concave and mortise face.
3, The sealing effect is not the same, and the bearing strength is not the same.
4, There is a short neck behind the tail of flat welding flange with neck, which can improve the rigidity of flange.
5, The bearing capacity is higher than that of flat welding flange, which is generally used in medium and high pressure occasions.

Package

a. Plastic bubble bag package b.Wove bag package c.Pallet d. Customized

Delivery time

Our Steel flat factory have high ability for production, the delivery time is 45days for small quantity, or if you are hurry for that, we can arrange and meet your shipping date.

Xi'an Longjoy Foreign Trade Co., Ltd. was established in 2002 and located in Xi'an Land Center, mainly engaged in the import and export of various pipe and pipe fittings. Our business scope is mainly in steel and plastic products, such as Carbon steel pipe fittings, stainless steel pipe fittings, flange, ductile iron pipe fittings, alloy pipe fittings, mar pipe fittings, HDPE pipe fittings. With the development of the business, we have accumulated rich trading experience and customer resources. Over the years, with excellent product quality and good business reputation, we have attracted many valuable customers in cooperating with us in the world.

Why Choose Us

1. Our advantage is that we can meet the needs of procurement at one time and provide a wide variety of pipes and fittings.

2. Nearly 20 years of professional trade experience to ensure that goods are delivered to you on time.

3. Stable cooperation with our partners to ensure fair price and quality of goods.

4. Choosing us means that we are your agent in China.

5. A perfect collaboration is the beginning of a long-term partnership.

Product Introduction

1. The company's main products include carbon steel pipe fittings, stainless steel pipe fittings, ductile iron pipe fittings, alloy pipe fittings, ma steel pipe fittings, flanges, etc.

2. According to the connection mode, it can be divided into butt welding pipe fittings, socket welding pipe fittings, threaded pipe fittings, etc.

3. Specific products include Elbow (long radius, short radius), Tee (equal, reducer), Reducer (concentric reducer, eccentric reducer), pipe cap, Cross Tee, Nipple, Branch pipe, Double socket collar, Piston, Joint, etc.

4. The main types of flange include WN Flange, Slip flange, socket welding flange, threaded flange, blind flange, etc.

Product Material Details

1. Carbon steel: ASTM / ASME a234 WPB, WPC.
2. Alloy steel: ASTM / ASME a234 WP 1-wp 12-wp 11-wp 22-wp 5-wp 91-wp911, 15Mo3 15CrMoV, 35crmov.
3. Stainless steel: ASTM / ASME A403 WP 304-304l-304h-304ln-304n ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti  ASTM/ASME  A403 WP 321-321H ASTM/ASME A403 WP 347-347H.
4. Low-temperature steel: ASTM / ASME A402 WPL3-WPL6.
5. High-performance steel: ASTM / ASME a860 WPHY 42-46-52-60-65-70.

6. Cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon, PVC, PPR, etc.

7. HDPE: PE100.

Our Faith

The customers as friends, and quality as lives. We commit ourselves to mold an image like that: the responsible supplier to customers; the reliable partner to cooperators, the respectable opponent to professions, the good school to the staff.

Our markets

At present, our business covers more than 40 countries in Africa, Europe, Southeast Asia, and the Middle East. And the annual import/export volume is more than $20 million. This achievement is all due to our customers' supports, and we keep our faith and manufacture the best goods.

Our success can not be separated from the support and trust of old and new customers. We will always treat people sincerely, adhere to principles, and provide customers with the best products and services.