Stainless Steel Weld Neck Flanges Manufacturer and Exporter in Saudi Arabia

Naysha Steel and Alloys is a major manufacturer and exporter of weld neck flanges in Saudi Arabia that supplies to the oil, gas, and petrochemicals, and also marine operations among others. Our flange products are manufactured in stainless steel, carbon steel, and also copper, and hastelloy variants using the latest tools and also technologies to ensure high precision, accuracy, and also durability. We know that weld neck flanges are very necessary for the safe and also reliable connections in the complicated systems, so we make sure that our flanges are made with the highest degree of accuracy and also top-quality materials to ensure that they work perfectly. We have a wide array of stainless steel weld neck flanges that come in many different sizes to meet the demands of the different business sectors. The long or short neck shape of the flanges also contributes to the strength and support of the pipes that it connects, lowering the stress levels at the points where the materials are connected and also eliminating the possibility of weak points. Small weld neck flanges possess a very unique feature in the form of small holes at the top side that guarantee the integrity of the entire flange and provide a particular solution to the situations where space or the critical details are limited. We are proud of the fact that at Naysha Steel and Alloys, we provide the weld neck flanges that conform to the international standards. We have become a very trusted brand in the industry due to our dedication to quality, accuracy, and also durability. We are committed to offering high-quality customer service, fast delivery, and also competitive prices, which makes us the go-to supplier of weld neck flanges in Saudi Arabia.

ss weld neck flanges white background hd image

Stainless Steel Weld Neck Flanges Manufacturer And Supplier in Saudi Arabia

Weld neck flanges are an very important part of the pipe fitting systems as they provide a very strong and watertight connections. They are particularly very beneficial in severe environments like the oil and gas industries, chemical plants, and also power plants. Weld neck flanges have a long or short neck that gives an additional support to the pipes it connects, making it possible to minimize the stresses at the points where the materials are connected and reducing the possibility of weak points. Naysha Steel and Alloys is committed to quality and innovation, and our ability to create durable and corrosion-resistant flanges spans several industrial applications. Our products are manufactured with the industry standards in mind and their sizes and configurations are tailored to suit a very diverse range of applications in the oil and gas, petrochemicals, and construction industries. We take pride in offering customized flange solutions that meet all your specific needs. Our wide selection of flange products includes stainless steel, carbon steel, copper, and hastelloy versions, which are made using modern tools and technology to create high-precision, very accurate, and long-lasting products. We strive to offer superior customer service, prompt delivery, and also competitive pricing, which makes us the leading provider of weld neck flanges in Saudi Arabia. Please contact us today to know more about our great products and excellent services.

Stainless Steel Weld Neck Flanges:Benefits:

    The stainless steel weld neck flanges are associated with so many advantages as same to the other types of flanges. Take a look for the key benefits of stainless steel weld neck flanges.

  • High Strength: Weld neck flanges constructed from stainless steel are commonly used for their durability and long lifespan. They are pressure-resistant and applicable for tough applications.
  • Corrosion Resistance: Weld neck flanges are suitable for aggressive chemical environments, high heat, and corrosive substances because stainless steel does not rust and is corrosion-resistant. This resistance ensures a long service life.
  • Leak-Proof Design: Weld neck flanges with a long neck and smooth transition reduce stress and minimize movements, almost eliminating leaks. The secure connection offers a high level of security and reliability in critical processes.
  • Easy Installation: Weld neck flanges can be installed with basic welding knowledge in a short time, saving time and effort during maintenance or repair.
  • Wide Range of Applications: Many industries use stainless steel weld neck flanges due to their superior corrosion resistance and reliable sealing. They are ideal for chemical industries, energy production, the oil and gas industry, and marine operations.
  • Cost-Effectiveness: While stainless steel weld neck flanges have higher initial acquisition costs, they are cost-effective in the long term due to lower maintenance costs and durability.
  • Compliance with Standards: Weld neck flanges are made in accordance with industry standards and regulations, ensuring good quality and reliability within different piping systems.

ASME B16.5 Weld Neck Flanges: ANSI 304# weld neck flanges and ANSI 300# weld neck flanges Manufacturer, Stainless Steel Class 105 weld neck flanges and Stainless Steel 316 weldneck Manufacturer And Exporter In Saudi Arabia

ASME B16.5 is one of the most popular standards for the pipe flanges and the flanged fittings. It includes the flange design pressure-temperature ratings, materials, dimensions, tolerances, marking, testing, and methods of designating the openings for pipe flanges and also flanged fittings. Weld neck flanges are among the most common flanges used in the high-pressure applications and as such, they are well suited for the very high and low temperatures. The two most common pressure ratings for the weld neck flanges are ANSI 150# and also ANSI 300#. The number denotes the maximum pressure in pounds per square inch that the flange can withstand at the given temperature. The flanges are produced from super austenitic stainless steel (ASTM A182) which is characterized by high corrosion resistance and low carbon content. They are used in a broad spectrum of industries such as utility scrubber assemblies (where corrosion resistance is a must-have), acid production plants (thanks to their capability to resist aggression), and fertilizer production plants (to provide reliability in the chemical processes).

The most common types of stainless steel used in the manufacture of weld neck flanges are the Stainless Steel Class 304 and also Stainless Steel 316. Stainless steel is selected due to its great corrosion resistance and also durability. Naysha Steel and Alloys produces ASME B16.5 weld neck flanges, such as ANSI 150# and also ANSI 300#. These flanges are very carefully manufactured and are of the highest quality. Naysha Steel and Alloys also offers stainless steel Class 304 and Class 316 weld neck flanges, which are also available in Saudi Arabia to fulfill the requirements of consumers.

SS WeldNeck Flanges Types

Sizes and Availablity of Stainless Steel weld neck flanges in our Saudi Arabia shop:

Nominal Size Outside Diameter
Min. Thickness
RF Dia.
No. of Bolt Holes Diameter of Holes Bolt Circle
SO Bore ID
WN Bore ID
Dia. Hub Base
Dia. of Hub Top
12 3.50 0.38 1.38 4 0.62 2.38 0.88 0.62 1.19 0.84 0.56 1.81
34 3.88 0.44 1.69 4 0.62 2.75 1.09 0.82 1.50 1.05 0.56 2.00
1 4.25 0.50 2.00 4 0.62 3.12 1.36 1.05 1.94 1.32 0.62 2.12
114 4.62 0.56 2.50 4 0.62 3.50 1.70 1.38 2.31 1.66 0.75 2.19
112 5.00 0.62 2.88 4 0.62 3.88 1.95 1.61 2.56 1.90 0.81 2.38
2 6.00 0.69 3.62 4 0.75 4.75 2.44 2.07 3.06 2.38 0.94 2.44
212 7.00 0.81 4.12 4 0.75 5.50 2.94 2.47 3.56 2.88 1.06 2.69
3 7.50 0.88 5.00 4 0.75 6.00 3.57 3.07 4.25 3.50 1.12 2.69
312 8.50 0.88 5.50 8 0.75 7.00 4.07 3.55 4.81 4.00 1.19 2.75
4 9.00 0.88 6.19 8 0.75 7.50 4.57 4.03 5.31 4.50 1.25 2.94
5 10.00 0.88 7.31 8 0.88 8.50 5.66 5.05 6.44 5.56 1.38 3.44
6 11.00 0.94 8.50 8 0.88 9.50 6.72 6.07 7.56 6.63 1.50 3.44
8 13.50 1.06 10.62 8 0.88 11.75 8.72 7.98 9.69 8.63 1.69 3.94
10 16.00 1.12 12.75 12 1.00 14.25 10.88 10.02 12.00 10.75 1.88 3.94
12 19.00 1.19 15.00 12 1.00 17.00 12.88 12.00 14.38 12.75 2.12 4.44
14 21.00 1.31 16.25 12 1.12 18.75 14.14 13.25 15.75 14.00 2.19 4.94
16 23.50 1.38 18.50 16 1.12 21.25 16.16 15.25 18.00 16.00 2.44 4.94
18 25.00 1.50 21.00 16 1.25 22.75 18.18 17.25 19.88 18.00 2.62 5.44
20 27.50 1.62 23.00 20 1.25 25.00 20.20 19.25 22.00 20.00 2.81 5.62
22 29.50 1.75 25.25 20 1.38 27.25 22.22 21.25 24.25 22.00 3.07 5.82
24 32.00 1.81 27.25 20 1.38 29.50 24.25 23.25 26.12 24.00 3.19 5.94

ASME B16.5, Stainless Steel 304 and SS 316#, ANSI Class 150 and ANSI 300# Weld Neck Flanges Availablity In Saudi Arabia

ss weld neck flanges manufacturer

Naysha Steel and Alloys is one of the global leaders in the industrial piping materials in Saudi Arabia that manufactures ASME B16.5, SS 304 and SS 316, ANSI Class 150 and ANSI 300# Weld Neck Flanges for different sectors. Owing to our dedication to quality, reliability, and also customer satisfaction, we have become the preferred partner for many clients in the region.

The ASME B16.5 Weld Neck Flanges we produce are made from some of the best stainless steel grades, including SS 304 and SS 316, which are known for its strength, durability, and also longevity. They have high pressure and also temperature resistance, making them highly suitable for use in the oil and gas, petrochemical, power generation, and also other harsh environments.

We have an ASME B16.5 Weld Neck Flanges in ANSI Class 150 and ANSI 300# rating that allows us to meet the project needs promptly. We provide a wide range of sizes, pressure ratings and also flange configurations to meet the needs of our many customers. We also provide customized services and also the value-added services like cutting, drilling, and also the coating that provide a perfect fit and also high performance for your piping systems. In Naysha Steel and Alloys, we are dedicated to the production of weld neck flanges that meet the international standards. Our quality, accuracy and also the durability has made us a reliable name in the market. Our aim is to provide the best customer service, fast delivery, and also competitive prices, so we are the leader in the weld neck flanges in Saudi Arabia.

Simple diagram to Understand of Weld Neck Flange Dimensions

Weld neck flanges are cylindrical flanges that are usually welded to the end of a pipe. The hub is put into the end of the pipe and then is welded, while the neck protrudes from the hub and acts as a point of attachment for the flange face. The flange face is the flat surface of the flange that is against another flange to create a sealed joint surface. The dimensions of a weld neck flange are very important for a proper fit and also performance. The figure below shows the main aspects of a weld neck flange.

SS Weld Neck Flanges Dimensions

In general-purpose industries, such as food processing, chemical processing, and water treatment, SS 304 weld neck flanges are very suitable since they have very high corrosion resistance, formability, and also weldability. In harsher corrosion conditions, particularly in those associated with chlorides, SS 316 weld neck flanges have a better corrosion resistance. In welding cases, SS 316L weld neck flanges are very preferable because of their very low carbon content, which really reduces the risk of carbide precipitation. SS 410 weld neck flanges are commonly used in the applications that require high strength and abrasion resistance, including the mining and construction machines. As for the highly corrosive environments such as chemical processing and also offshore oil and gas industries, SS 904L weld neck flanges provide a better corrosion resistance.

Choice of the appropriate grade of stainless steel to be used in the weld neck flanges is a very key decision that should take into consideration several factors which may include environmental operating conditions like temperature and pressure as well as the specific application requirements among others. In this respect, it is recommended to cooperate with an experienced provider or engineer in choosing the best grade of stainless steel for a project based on all the factors that must be considered in order to achieve the optimal performance and longevity of the weld neck flange.

Stainless Steel Weld Neck Flange Chemical Composition Table

Grade/ Marked Symbol Carbon (Max) Manganese (max) Silicon (maximum) Phosphorus (max) Sulfur (max) Chromium Molybdenum Nickel N
F304 0.08 2 0.75 0.045 0.030 18-20 - 8-11 -
F304L 0.035 2 1.00 0.045 0.030 18-20 - 8-13 -
F316 0.08 2 0.75 0.045 0.030 16-18 2-3 10-14 64.845
F316L 0.035 2 1.00 0.045 0.030 16-18 2-3 10-14 68.89


SS Weld Neck Flanges Price List in Saudi Arabia: Valid From 1st February 2024

Take a better look on price list of stainless steel and weld neck flanges in Saudi Arabia

WNRF FLANGES ASTM A182 F304 B16.5 150# SCH-40S Price
15mm 0.54 543.95 591.25 8.242 8.958 5.551 6.033 9.890 10.750
20mm 0.78 854.45 928.75 12.946 14.072 8.719 9.477 15.535 16.886
25mm 1.12 1009.70 1097.50 15.298 16.629 10.303 11.199 18.358 19.955
32mm 1.47 1179.90 1282.50 17.877 19.432 12.040 13.087 21.453 23.318
40mm 1.90 1475.45 1603.75 22.355 24.299 15.056 16.365 26.826 29.159
50mm 2.77 1707.75 1856.25 25.875 28.125 17.426 18.941 31.050 33.750
65mm 4.49 2717.45 2953.75 41.173 44.754 27.729 30.140 49.408 53.705
80MM 5.44 3105.00 3375.00 47.045 51.136 31.684 34.439 56.455 61.364
100mm 7.69 4347.00 4725.00 65.864 71.591 44.357 48.214 79.036 85.909
125mm 9.40 7452.00 8100.00 112.909 122.727 76.041 82.653 135.491 147.273
150mm 11.82 9315.00 10125.00 141.136 153.409 95.051 103.316 169.364 184.091
200mm 19.11 13972.50 15187.50 211.705 230.114 142.577 154.974 254.045 276.136
250mm 26.19 18630.00 20250.00 282.273 306.818 190.102 206.633 338.727 368.182


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Stainless Steel Flange Welding Neck ANSI 150, IS6392 Weld Neck Flanges, Weld Neck SS Flanges Manufacturer, UNS S31803 Weld Neck Flanges Stockist, UNS S31803 Weld Neck Flanges Manufacturers, UNS S31803 Weld Neck Flanges Exporter, UNS S32205 Weld Neck Flanges Stockist : Grades & Classes (#)

  • ASTM A182 F304/F304L: Standard austenitic stainless steel grade.
  • ASTM A182 F347/F347H: Stabilized stainless steel grade with niobium addition.
  • ASTM A182 F321/F321H: Stabilized stainless steel grade with titanium addition.
  • ASTM A182 F316/F316L: Austenitic stainless steel with enhanced corrosion resistance.
  • ASTM A182 F53: Super duplex stainless steel grade with excellent corrosion resistance.
  • Class 125: Class 125 Weld Neck Flange suitable for aggressive conditions.
  • Class 150: Weld neck flange design for low-pressure applications.
  • ASTM A182 F51: Duplex stainless steel grade with high strength and corrosion resistance.
  • Class 600: Weld Neck Flange Class 600 designed for high-pressure applications.
  • Class 300: Flanges suitable for moderate-pressure applications.

SS Flange Welding Neck 150, 18 300 Class SCH 80 Weld Neck Flange, 150# Weld Neck Flange SCH 80, Welding Neck Flanges SCH 40, SS Weld Neck Flanges Specifications

Specification Of : Weld Neck Stainless Steel Flanges
JIS Standards 5K, 10K, 40K, 16K 20K 30K, 63K
Size Of Bore Diameter Flange NPS ≤ 10
Manufacturer Of Standard Dimensions EN-1092 Flange, ASME B16.48 Flange, API605 Flange, BS4504 Flange, EN1092 Flange, UNI Flange, ISO Flange, API7S-43 Flange, ANSI/ASME B16.5 Flange, API7S-15 Flange, MSS S44 Flange, IS 2062 Flange, ASME B16.36 Flange, DIN Flange, AWWA C207 Flange, B16.47 Series A & B Flange, BS1560-3.1 Flange, ISO70051 Flange, API Flange, ASME Code for 12 inches Welding Neck Flanges.
Minimum Pressure 150# To 2500#
Flange Face Type Raised Face, Groove And Small Tongue Groove, RTJ, Weld Neck Flanges Flat Face, Large Tongue & Large Male-Female And Small Male-Female, Lap-Joint Face.
Top Six Type Of Flanges Threaded, Lap Joint, Socket-Weld, Blind, Slip-On or Weld Neck Flanges
Standard Materials Duplex Steel & Super Duplex Steel, Copper Nickel, Wrought Iron, Inconel, Mild Steel, Stainless Steel, Hastelloy, Cast Iron, Alloy Steel, Carbon Steel.
Thickness Length NPS ≤ 18
Welding neck flanges size (1/2") To (48")
Manufacturing Process Forged/ Machined/ Heat Treated
Other Type Of Flange Forged/ Plate/ Threaded
Application Oil And Gas Industry
Power Plants Industry
Food Processing And Manufacturing
Waterworks Systems
Fossil Fuel Power Plants
Nuclear Power Application
Municipal Pipe Systems


Please find below our other manufacturing and Sales network in Saudi Arabia : (Contact us for detailed information for your nearest branches)

  • Stainless Steel Weld Neck Flanges manufacturer and contractor in Riyadh, Saudi Arabia.
  • Stainless Steel Weld Neck Flanges manufacturer and supplier in Jeddah, Saudi Arabia.
  • Stainless Steel Weld Neck Flanges manufacturer and stockists in Mecca, Saudi Arabia.
  • Stainless Steel Weld Neck Flanges manufacturer and Exporter in Sharjah, Saudi Arabia.
  • Stainless Steel Weld Neck Flanges manufacturer and warehousing in Muscat, Saudi Arabia.
  • Stainless Steel Weld Neck Flanges manufacturer and wholesalor in Dammam, Saudi Arabia.

Frequently Asked Questions

What is a stainless steel weldneck flange?

A stainless steel weldneck flange is a type of pipe flange designed to be welded onto the neck of a pipe. It provides a smooth, high-strength connection for joining pipes, valves, and other equipment. All the standard Flange dimensional sizes are Readily available at any Naysha Steel branch in Saudi Arabia.

What types of stainless steel material grades are used for weldneck flanges?

Common stainless steel materials include 304, 316, and 321, among others. The choice of stainless steel grade depends on the specific application and the required corrosion resistance.

What sizes are available for stainless steel weldneck flanges?

Stainless steel weldneck flanges are available in a wide range of sizes, typically ranging from 1/2 inch to several feet in diameter. The size you need depends on your specific piping system requirements. All the standard Flange dimensional sizes are Readily available at any Naysha Steel branch in Saudi Arabia.

Can stainless steel weldneck flanges be used with other pipes?

Yes, stainless steel weldneck flanges can be used with pipes made of other materials, provided the flange material is compatible with the pipe material, and the connection is properly sealed.

Industries served by Stainless Steel Weld Neck Flanges In Saudi Arabia

In the oil and gas industry, blind Alloy Steel flanges are used in pipelines, storage tanks, and offshore platforms. They are employed for closing off openings during maintenance, repair, or when a branch connection is not required. Petrochemical plants utilize blind Alloy Steel flanges in equipment such as reactors, distillation columns, and storage vessels. These flanges provide a secure and leak-proof seal when closing off unused openings or isolating sections of the process.

oil gas manufacturer
Oil and Gas Industries

The oil and gas industry includes a wide range of from drilling and production to refining and marketing. Some of the major players in this include oil and gas companies, service providers, equipment.

petroleum manufacturer supplier
Petroleum Industries

In the drilling process, stainless steel is used to make drill bits, pipes, and other equipment that must withstand high pressures and temperatures. Stainless steel is also used to make pumps, valves, and fittings for the transportation.

chemical flanges
Shipbuilding in India

In storage applications, stainless steel is used to make tanks and containers that can safely store corrosive and hazardous chemicals. It is also used in piping systems for chemical transfer and distribution chemical industry.

Marking & Pricing

Products are packaged to ensure that there is no damage during of goods transport. In case of exports, standard export packaging is done with utmost care in wooden covering or boxing. All products are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make customized marking on our products.

Quality Assurance

At Naysha Steel, all fittings and flanges are subject to strict inspection at each and every stage of the production process, from starting material purchasing to product dispatch. They are visually examined for compliance to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality compliance of products.

Test Certificates: Manufacturer Test Certificate as per EN 10204 / 3.1B Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report