Stainless Steel/304/316/316L/Xxxnx/Forged/AISI/150 RF/Female Thread/Bsp/NPT Threaded/Screw/Blind/Ss Welding/Weld Neck Flanges with Tube/Pipe

Product Description

Flange Usage Instructions:

   1. Inspect– Check for damage, corrosion, or deformities before installation.  
   2. Align – Position the flange correctly, ensuring bolt holes match the connecting pipe or equipment.  
   3. Gasket Insertion– Place a suitable gasket between flanges to prevent leaks.  
   4. Bolt Tightening – Insert and tighten bolts evenly in a crisscross pattern to ensure uniform pressure.  
   5. Pressure Test– Conduct a leak test (hydrostatic/pneumatic) before full operation.  
   6. Maintenance – Regularly check bolts and gaskets for wear or loosening.  

Flange Manufacturing Process 

   1. Flange Manufacturing Process (Brief Description)Material Selection – Choose raw materials (carbon steel, stainless steel, etc.) based on standards like ASTM or DIN.  

   2. Cutting & Shaping – Cut metal plates or bars, then forge or machine into rough flange shapes.  
   3. Heat Treatment – Annealing or quenching to enhance strength and durability.  
   4. Machining – Precision CNC/lathe machining for bolt holes, sealing surfaces, and dimensional accuracy.  
   5. Surface Treatment – Apply coatings (galvanizing, painting) or polishing for corrosion resistance.  
   6. Quality Inspection – Check dimensions, pressure rating, and defects (UT/RT testing if required).  
   7. Marking & Packaging – Stamp with standard markings (size, material, pressure class) and pack for shipment.  

right elevation

left elevation

front elevation

Technical Specifications

(Custom configurations available upon request.)

Product Name	Stainless Steel Flange
Material	ASTM A105, SS304, SS316, Carbon Steel
Type	Weld Neck, Slip-on, Blind, Threaded
Size	1/2'', 2'', 4'', 10'', 24'' (DN15-DN600)
Pressure Rating	PN10, PN16, Class150, Class300
Standard	ANSI B16.5, DIN2576, JIS B2220, HG/T20592-2009

Company Profile

WENZHOU LIANGGANG PIPE FITTING VALVES CO., LTD.

Wenzhou Lianggang Pipe Fitting Valves Co., Ltd. Is a manufacturer specializing in threaded pipes fitting and valves. Especially in recent years invented technical screw tap equipment, to overcome the product skew angle of the world problems, the products we sale can achieve without skew Angle, appearance no broke, product no leakage. The user can use the appearance is beautiful and Quality is reliable high grade advanced series of products. As a famous-nationwide one, our companyobtains advanced equipments high-grade technicians, exports high-level products to America, Southeast Asia and Middle East Regions and enjoy a great reputation inside all over the world.

Threaded pipe fittings

As the first to adopt thread technique and high-precise numerical control machine for production, the company conrrect faults in pipe industry by operating pressure test, all according to ISO4144 standard.

Valve

Ball valves such as 1-PC, 2-PC and 3-PC, gate valve, globe valve, check valve and Y-type strainer are all manufactured by casting through high-precise numerical control machine, go through perfect examination.

Our tenet is that "Survive on quality, gain markets on credit. "To make top-ranking products and superexcellent services is our promise.

FAQ

Q:Are you factory or trading company?
A: We are factory located in WenZhou city, China

Q:What is the lead time
A:5-7 days for usual items in stock

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q:Which packing material do you use for the sea shipping?
A: For sea shipping,we will packaging standard wooden pallet.The parts will packing with carton box.

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.