Alloy Steel Blind Flanges: ASME B16.5 Rated for Secure System Isolation & Pressure Capability

Alloy Steel Blind Flanges: ASME B16.5 Rated for Secure System Isolation & Pressure Capability

Alloy Steel Blind Flanges are solid discs without a center bore, used to blank off the ends of piping, valves, or pressure vessel openings. They are essential for pressure testing, isolating sections of a pipeline for maintenance, or capping lines for future expansion. Built to match the pressure rating and facing of the mating flange, they are subjected to the highest bolt loads and bending moments of any flange type.

Product Description:
A simple, solid plate machined from alloy steel forging (ASTM A182) with bolt holes matching the corresponding flange standard. The facing (RF, RTJ) is machined to perfectly mate with the connecting flange. They are available in all standard sizes and pressure classes.

Key Parameters:
Manufactured to ASME B16.5 specifications for all pressure classes (Class 150 to Class 2500) and sizes (1/2" to 24" and above). Thickness is calculated to withstand the pressure rating without deformation. Available with Raised Face (RF), Ring Type Joint (RTJ), or Flat Face (FF) finishes.

Applications:
Used for pressure testing (hydrotest) of piping systems and vessels. Employed to permanently or temporarily isolate equipment for safety during maintenance. Installed at the end of piping headers or manifolds that may be extended in the future. Critical in refinery turnarounds and plant commissioning.

Advantages:
Provides absolute, leak-proof isolation when properly bolted. Allows easy access to the pipeline interior for inspection or cleaning after removal. Simple in design yet robust enough to handle full system pressure. Offers flexibility in system design and maintenance planning.

Functionality:
Functions as a high-pressure "cap" or "plug." Its primary purpose is to seal the end of a piping system completely. It must withstand the full mechanical load from internal pressure transferred through the bolting, making its structural integrity paramount for system safety.

Payment & Invoicing

1. First-Time Clients: 50% advance payment, 50% balance before shipment.
2. Strategic Clients: 30% advance, 70% payment against copy of Bill of Lading.
3. Long-Term Agreements: 60-day credit terms available (subject to credit approval).
4. Invoicing: 13% VAT Special Invoice provided; FORM A Certificate of Origin for exports.
5. fication System: Laser marking includes material code, pressure rating, and flow direction arrows.

FAQ

1. Are you trading company or manufacturer ?
We are manufacturer ,You can see the Alibaba certification.
2. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.