Weld Neck Flanges Manufacturer In India – High Strength, Corrosion Resistant Stainless, Carbon & Alloy Grades Meeting Asme Ansi Din Standards

High Quality Weld Neck Flanges Manufacturer In India
₹17 - ₹105

Minimum Order : 200

Customization as per requirements

Specification Details
Flanges TypesSlip On, Weld Neck, Long Weld Neck, Threaded, Blind, Companion, Lap Joint, Slip On, Weld Neck, Long Weld Neck, Threaded, Blind, Lap Joint, Companion
Class150 Lbs, 300 Lbs, 600 Lbs, 900 Lbs, 1500 Lbs, 2500 Lbs Asa 150, Asa 300, Pn 6, 10, 16, 40, 64, 100, 160, 25, 150 Lbs, Pn 6, 300 Lbs, 600 Lbs, 900 Lbs, 1500 Lbs, 2500 Lbs Asa 150, Asa 300
Size48″ (1200nb) Dn10~dn5000, 1/2″ (15 Nb), 1/2″ (15 Nb), 48″ (1200nb) Dn10~dn5000
TypeRaised Face (rf), Flat Face (ff), Lap Joint Face (ljf), Ring Type Joint (rtj), Large Male Female (lmf), Small Male Female (smf), Large Tongue & Groove, Small Tongue, Groove, Raised Face (rf), Large Male Female (lmf), Small Tongue, Groove, Small Male Female (smf), Flat Face (ff), Ring Type Joint (rtj), Lap Joint Face (ljf), Large Tongue & Groove

Leading Weld Neck Flanges Manufacturer in India – Precision Fit, High-Pressure Steel Grades compliant with ASME ANSI API Specifications

Nitech Stainless Inc is a Weld Neck Flanges manufacturer that manufactures flanges that are precision engineered to fit high pressure and high temperature piping systems. Tapered hub allows the smooth conversion of stress on flange to pipe, thus enhancing the integrity of the weld and minimizing turbulence in the flow path. The individual flanges are made of highly chosen alloy grades and stainless steel to enhance the corrosion resistance, dimensional and structural voltage over the portion of time. The smooth bore ensures steady flow and strict quality control is made so that it does not leak in the harsh industrial settings.

Product Grade & Specification Table

MaterialStandard (Common)Pressure ClassSize RangeFacing TypeFinishTypical Application
Carbon SteelASTM A105 / ASME B16.5Class 150 – 2500½” – 48”RF / RTJBlack / CoatedRefineries, Petrochemical, Oil & Gas
Low Temp Carbon SteelASTM A350 LF2Class 150 – 1500½” – 24”RF / RTJCoatedCryogenic & low-temperature systems
Alloy SteelASTM A182 F11/F22Class 300 – 2500½” – 36”RF / RTJBlack / CoatedHigh temperature & high pressure
Stainless SteelASTM A182 F304/316Class 150 – 2500½” – 48”RF / RTJMachinedCorrosive & marine environments
Duplex / Super DuplexASTM A182 F51/F55Class 300 – 1500½” – 24”RF / RTJMachinedOffshore, desalination, chemical exposure
Nickel AlloyASTM B564 (Alloy 400/625)Class 150 – 600½” – 12”RF / RTJMachinedMarine & chemical process plants

Key Features

  • Application Scope: Weld Neck Flanges are common where there are petrochemical piping, power stations, offshore platforms, refinery units, LNG system and industrial process lines that require high strength welded joints.

  • Structural Design: The long tapered hub forms facilitate the stress flow between flange and pipe, less turbulence, and eliminates erosion at the weld region.

  • Material Grades: Materials are available in the Carbon Steel, Low Temp, Stainless Steel (304/316) depending on process media and temperature, as well as Duplex, Super Duplex, Alloy Steel and Nickel Alloys.

  • Technical Attributes:

  1. Withstands high-pressure and high temperature.
  2. Welded connection which is airtight.
  3. ANSI compatible with ASME Standards and API Standards
  4. Best suited to cyclic pressure & thermal variation.

  • Other Alternatives: Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), custom machining, NACE compliance, and anti-corrosion coating depending on application end use.

Weld Neck Flanges Clients Project


The weld neck flange has been identified to be very reliable in stressful and high-temperature setting. The type of flange that is selected by industries is based on the fact that it offers high strength in the weld, accuracy of dimensions and high sealing performance. It usually gets welded to the neck of the pipe to create a smooth passage of flow to eliminate loss of pressure. In procurement, engineers consider media compatibility, temperature range, pressure class and facing flange to guarantee safe operation of the system.

Product SuppliedQuantityIndustry / FacilityLocation (India)
SS 316 Weld Neck Flanges Class 300121 PiecesOffshore PlatformMumbai
CS ASTM A105 Weld Neck Flanges Class 600182 PiecesPetrochemical RefineryVadodara
Alloy Steel F22 Weld Neck Flanges Class 90094 PiecesPower Generation UnitChennai
Duplex F51 Weld Neck Flanges Class 150159 PiecesDesalination PlantJamnagar

These flanges find extensive industry application in global b2b trade with refineries, petrochemical plants, offshore platforms, power generation and heavy process industries where safety and uptime are critical. The compatibility to international standard, simplicity in fabrication, and reliable service life even in case of cyclic loading and thermal fluctuations are valued by the customers. Our weld neck flanges are a strong, time-tested product with great weldability and very low maintenance requirements; whether you are renovating existing lines or installing new ones. We also suggest our high quality Slip On Flanges of the very brand to be used as a complement to space-constrained layouts.