Spades & Ring Spacers – ANSI / ASME B16.48 Manufacturer in India
AstroForge Fitting Industries is a trusted manufacturer and supplier of ANSI / ASME B16.48 Spades and Ring Spacers (Paddle Blanks & Paddle Spacers) in Mumbai, India. We offer high-quality spades, ring spacers, and spectacle blinds designed for industrial piping systems where flow isolation or maintenance is required. Our products comply with ASME, ANSI, DIN, EN, BS, JIS, and MSS SP-44 standards.
Spades and ring spacers are commonly used as temporary flow isolation devices in pipelines. While a Spade (Paddle Blank) is a solid disk that blocks flow, a Ring Spacer (Paddle Spacer) is an open disk that allows flow. These components are widely used in oil & gas, petrochemical, power generation, marine, and chemical processing industries where frequent maintenance is not necessary.
What Are Spades & Ring Spacers?
Spades (Paddle Blanks):
A spade is a solid metal plate inserted between two flanges to stop the flow in a piping system. It is typically used when the line needs to be isolated for maintenance or inspection.
Ring Spacers (Paddle Spacers):
A ring spacer is a metal disk with an opening that allows fluid flow. It is installed in the same way as a spade but used when the pipeline is operational.
Standards & Specifications – Spades & Ring Spacers
Our spades and ring spacers are manufactured according to ANSI / ASME B16.48 and MSS SP-44 with strict adherence to EN 10204 3.1 certification standards.
Size Range:
NPS 1/2″ to NPS 24″
Pressure Classes:
Class 150, 300, 600, 900, 1500, 2500
Flange Face Types:
Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), and Small/Large Male-Female (SMF/LMF)
Common Materials:
Carbon Steel: ASTM A105, A350 LF2, A694 F52-F70
Stainless Steel: ASTM A182 F304, F316, F321, F347, F904L
Duplex & Super Duplex: ASTM A182 F51, F53, F55
Nickel Alloys: Inconel, Monel, Hastelloy, Alloy 20
Copper Alloys: Cupro Nickel 90/10, 70/30
Titanium, Aluminium, Brass, and Special Alloys upon request
Coating Options:
Oil Black Paint
Anti-Rust Paint
Zinc Plated / Galvanized
Hot & Cold Dip Galvanizing
Applications of Spades & Ring Spacers
Spades and ring spacers are widely used in industries requiring flow isolation and maintenance flexibility, including:
- Oil & Gas Pipelines
- Petrochemical & Chemical Plants
- Heavy Oil Refineries
- Marine & Offshore Applications
- Power Generation & Nuclear Plants
- Acid & Chemical Processing Systems
Advantages of Using Spades & Ring Spacers
Easy Line Isolation: Quick and effective pipeline flow shut-off during maintenance.
Durability: Manufactured from high-quality forged or plate materials for long service life.
Compliance: Meets international standards including ASME B16.48 & MSS SP-44.
Custom Fabrication: Available in custom materials, coatings, and sizes.
Cost-Effective Alternative: Often preferred over spectacle blinds for large-diameter piping.
Testing & Certification
All ASME B16.48 Spades & Ring Spacers are supplied with complete documentation:
- EN 10204 3.1 / 3.2 Material Test Certificates
- NACE MR0103 / MR0175 Compliance
- 100% Radiography & Ultrasonic Testing Reports
- Third-Party Inspection Reports (TPI)
Why Choose AstroForge Fitting Industries?
Extensive stock of standard and custom spades & ring spacers
Manufacturing capabilities up to Class 2500
Expertise in exotic and high-performance alloys
Global export to USA, Europe, Middle East, and Asia
ISO-certified production with strict quality control
Industries We Serve
Leading pipe fitting manufacturers for Following sectors
FAQs - Spades & Ring Spacers
Spades (Paddle Blanks) are used to block flow in a pipeline, while Ring Spacers allow flow. They are used for maintenance and isolation in industrial piping systems.
A Spade is a solid plate that stops flow, whereas a Ring Spacer has an opening that lets fluid pass. They are often used alternately in the same pipeline.
They are manufactured according to ASME B16.48, MSS SP-44, and can also comply with DIN, EN, BS, and JIS standards.
We manufacture Spades and Ring Spacers from NPS 1/2” to NPS 24” in all standard pressure classes.
Our products are available in Class 150, 300, 600, 900, 1500, and 2500.
They are available in Carbon Steel, Stainless Steel, Duplex, Super Duplex, Nickel Alloys, Copper Alloys, Titanium, and Aluminium.
They are used in oil & gas pipelines, petrochemical plants, refineries, marine systems, and power plants for flow isolation and maintenance.
They are installed between two flanges in the piping system and secured using bolts, similar to spectacle blinds.
Yes, we provide EN 10204 3.1/3.2 certificates, NACE compliance, and third-party inspection reports with all products.
Absolutely. We can manufacture custom sizes, materials, coatings, and special designs based on client drawings or requirements.