Forged Threaded Reducing Flange
Pressure rating: Class 150 | 300 | 600 | 900
Large mouth end: RF sealing surface bolt connection
Small mouth end: NPT/BSPT thread (US standard/UK standard)
- Product Introduction
Products Description
The Forged Threaded Reducing Flange is a forged flange characterized by threaded connection and reducing capability, used to achieve safe connections between different pipe diameters without welding, offering quick installation and reliable sealing.
Manufacturing Process
Raw Materials: Forged round steel conforming to ASTM/EN standards.
Forging: High-temperature forging improves material density and mechanical strength.
Machining: CNC precision machining of threads, flange faces, and bolt holes ensures dimensional consistency.
Inspection and Testing: Dimensional inspection, thread gauge inspection, PMI material inspection; MTC 3.1 or third-party reports available.
Customizable Range
Sizes: 1/2"–24", custom sizes available (reducers and underruns supported)
Pressure Rating: Class 150 / 300 / 600
Materials: A105, A350 LF2, 304, 316, 316L
Thread Type: NPT, BSPP, BSPT, DIN thread
Surface Treatment: Rust-preventive oil, black anodizing, electro-galvanizing
Packaging: Carton, pallet, plywood box
Packaging and Transportation
Rust-proof oil treatment applied before shipment.
Cardboard dividers used individually or in rows to prevent impact damage.
Pallet/plywood crates can bear 800–1200kg.
Strap straps and wrapping film reinforce for waterproofing.
Familiar with export container loading methods to avoid damage caused by heavy cargo.
Supports sea/air/land transport, providing reinforcement solutions.
Why Choose Us
Specializing in forged threaded flange production, with over 15 years of export experience, and familiar with ASME/EN/BS standards.
Using all-forged blanks and CNC precision machining, our threads boast high accuracy and strong dimensional stability.
A comprehensive quality control system supports MTC 3.1 and third-party testing, ensuring reliable batch consistency.
Five disruptive core values
|
Advantages |
Technological breakthrough |
Engineering benefits |
|
No welding safety 100% |
No sparks from thermal work · ATEX explosion-proof certification · Absolutely safe in flammable environments |
Chemical plant/oil depot maintenance risk cleared |
|
30-second diameter change connection |
Step threaded hole · Single flange double bore · Eliminating the reducer + flange combination |
Installation efficiency increased by 70% |
|
Millimeter-level space optimization |
Axial length < standard flange + reducer 50% · Compact structure design |
Save 40% of space in narrow cabins/equipment |
|
Double seal zero leakage |
Large mouth end metal gasket + small mouth end conical thread seal · Double leak-proof barrier |
Passed API 598 2.0 times water pressure test |
|
Corrosion-lifetime immunity |
316L/625 alloy lining · Full surface passivation treatment |
Pickling line life ≥15 years |
Global common technical specifications
1. Basic parameter matrix
|
Parameters |
Standard Specifications |
Special Customization |
|
Variable diameter combination |
DN15×DN10 | DN25×DN15 | DN50×DN25 | DN100×DN80 (Regular stock) |
DN300×DN200 extra-large gauge |
|
Pressure rating |
Class 150 | 300 | 600 | 900 |
Class 1500 High voltage |
|
Thread type |
Large mouth end: RF sealing surface bolt connection |
Metric G thread /SAE oil port |
|
Reduction ratio |
1:1.5 (DN50×DN33) | 1:2 (DN100×DN50) | 1:3 (DN150×DN50) |
1:5 Limit deflection |
2. Structure and material details
|
Structural parts |
Technical solutions |
|
Flange body |
Integral forging · Stepped concentric holes · ANSY-optimized wall thickness |
|
Large bore end |
RF face seal · Class 300 up to PN5.0MPa · Integrated bolt holes |
|
Small bore end |
Precision conical tube thread (NPT/BSPT) · Hardening treatment (HRC≥35) · Anti-seizing copper coating |
|
Main body material |
Carbon steel: ASTM A105 galvanized |
|
Enforce standards |
ASME B16.5 | ASME B16.25 | ISO 7005 | DIN 2635 |
FAQ
Q: Which international standards does it comply with?
A: ASME B16.5, EN, BS standards; can be matched according to customer market requirements.
Q: Common materials and pressure ratings?
A: A105, 304, 316, etc.; Class 150–600.
Q: What types of threads are available?
A: NPT, BSPP, BSPT, DIN can all be produced on demand.
Q: Can you make non-standard reducing sizes?
A: Customization based on drawings and samples is supported.
Q: Minimum Order Quantity (MOQ)?
A: Small batches are supported for standard models; special specifications are confirmed upon order confirmation.
Q: Quality inspection methods?
A: 100% inspection of dimensions and thread gauges; PMI, pressure testing, and third-party testing are available.
Q: How long is the lead time?
A: Standard 7–15 days; expedited production is available for large orders.
Q: Is the packaging and transportation safe?
A: Export-grade pallets/wooden crates with dust and moisture protection to ensure no damage during long-distance transportation.
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