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NXF UNS S13800 13-8MO Out Diameter DN15-1200 Pressure Class150-2500 Special Stainless Steel Forging Blind Flange
2026-04-08 17:25 NXF-GROUP
5
Product Description
13-8MO Introduction
13-8MO Introduction
Stainless steel grade 13-8 Mo has a high toughness and excellent resistance to stress corrosion cracking. It has been designed to handle applications where high strength, corrosion resistance, toughness, and stress resistance are essential. This is a martensitic alloy.
13-8MO Chemical Composition
13-8MO Chemical Composition
Grade 13-8 stainless steel is a high-strength, precipitation-hardening martensitic alloy known for superior toughness, corrosion resistance, and excellent transverse properties. It typically contains 12.25-13.25% Chromium, 7.5-8.5% Nickel, and 2.0-2.5% Molybdenum, often used in aerospace, nuclear, and petrochemical applications.
Introduction to common type of Blind Flange
Introduction to common type of Blind Flange
A blind flange is a solid, hole-less plate used to seal the end of a piping system, pressure vessel opening, or valve, preventing flow and allowing for easy maintenance, inspection, or future expansion. They are typically bolted into place, providing a removable, high-pressure seal in industries like oil & gas, petrochemicals, and water treatment
Blind Flanges Drawing
13-8 Mo of Chemical Composition and Mechanical Properties
Our advantage as follow:
1.We have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can giveyou the lowest price.
2. We can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality.
3. Our biggest advantage is 3S service. Small quantity, short time, special materials.
4.We have excellent quality certificate system and trademark certificate
3. Our biggest advantage is 3S service. Small quantity, short time, special materials.
4.We have excellent quality certificate system and trademark certificate
Product processing
Blind flange production involves selecting high-grade steel (carbon, stainless, alloy), followed by cutting, forging or rolling, heat treatment, and precision CNC machining. The process includes forming a solid, hubless disk with bolt holes and specific face finishes (e.g., RF, RTJ) to seal piping ends, typically using forging for superior strength and cutting/rolling for larger sizes
Key Stages in the Production Process:
* Material Selection and Inspection: High-quality billets of carbon steel (ASTM A105, A350), stainless steel (ASTM A182F304/316), or alloy steel are chosen based on the required pressure and temperature, verified by chemical analysis.
* Forging (Common Method):
* Material Selection and Inspection: High-quality billets of carbon steel (ASTM A105, A350), stainless steel (ASTM A182F304/316), or alloy steel are chosen based on the required pressure and temperature, verified by chemical analysis.
* Forging (Common Method):
* Heating: The billet is heated to the required forging temperature.
* Open or Closed Die Forging: The heated metal is formed under intense pressure using hydraulic presses or hammers to create a dense, refined grain structure, improving mechanical strength.
* Open or Closed Die Forging: The heated metal is formed under intense pressure using hydraulic presses or hammers to create a dense, refined grain structure, improving mechanical strength.
* Alternative Production (Large Flanges):
* Plate Rolling/Cutting: For large blind flanges, pieces are cut from steel plates and rolled into shape. This method boasts good density.
* Welding: If needed, the joint is welded and subjected to X-ray testing.
* Heat Treatment: To relieve internal stress and enhance mechanical properties (hardness/ductility), the forged flange is subjected to heat treatment, such as annealing, normalizing, or quenching and tempering.
* Machining (CNC): Using CNC machines, the flange is finished to precise specifications. This includes machining the outer diameter, the gasket surface (Raised Face - RF, or Ring Type Joint - RTJ), and drilling bolt holes.
* Finishing and Testing:
* Welding: If needed, the joint is welded and subjected to X-ray testing.
* Heat Treatment: To relieve internal stress and enhance mechanical properties (hardness/ductility), the forged flange is subjected to heat treatment, such as annealing, normalizing, or quenching and tempering.
* Machining (CNC): Using CNC machines, the flange is finished to precise specifications. This includes machining the outer diameter, the gasket surface (Raised Face - RF, or Ring Type Joint - RTJ), and drilling bolt holes.
* Finishing and Testing:
* Waterline Processing: Creating the finished surface for sealing.
* Inspection: Final checks include dimension, hardness, and ultrasonic tests to ensure compliance with standards like ASMEB16.5.
* Inspection: Final checks include dimension, hardness, and ultrasonic tests to ensure compliance with standards like ASMEB16.5.
Specification
Packing & Delivery
To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.
Company Profile
New XiFei (SuZhou) Business Co.,Ltd is one of the leading and most respected manufacturers in China. Our products include metals,machinery, containers, construction materials, mechanical products, electrical systems, and medical accessories. Established in 1980, XiFei has been working diligently ever since to embrace the needs of our global customer base.We work to ensure absolute customer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Management and Craftsmanship." Our advantage as follow: 1.We have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price. 2. We can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality. 3. Our biggest advantage is 3S service. Small quantity, short time, special materials.
Our advantage:3S Service(Small Quantity/Short Time/Special Material)
Certification
FAQ
1. who are we?
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern
Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central
America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled
seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A;
Language Spoken:English,Chinese
6. Are you trading company or manufacturer ?
We are manufacturer.
7. 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.
8. 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.
9. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern
Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central
America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled
seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A;
Language Spoken:English,Chinese
6. Are you trading company or manufacturer ?
We are manufacturer.
7. 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.
8. 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.
9. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
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