Why choose us?
1. Quality material guarantee
304/316L stainless steel (ASTM A351 standard), excellent corrosion resistance (through 96 hours of salt spray test), suitable for chemical, Marine and other harsh environments.
Outstanding mechanical properties: tensile strength ≥515MPa, yield strength ≥205MPa, operating temperature range -196℃ to 800℃.
2. Precision structure design
Support ANSI, DIN, JIS and other multi-standard flange customization, pressure grade covering PN6-PN40 (150LB-300LB).
It can produce oversized flanges (diameter ≤2000mm), and the wall thickness tolerance is controlled within ±0.5mm.
3. Multi-functional application adaptation
Suitable for pipeline connection, valve assembly, pressure vessel and other scenarios, sealing surface can be processed RF/FF/RTJ and other types.
Provide secondary processing services such as drilling and groove prefabrication to reduce the workload of on-site installation.
4. Strict quality control
100% penetration testing (ASTM E165) and ultrasonic testing (ASTM A388).
Provide material reports (MTC) and third-party certifications (e.g. CE, PED).
Product introduction
Mechanical flanges are key connectors for industrial piping systems, manufactured in 304/316L stainless steel (ASTM A351 standard) by investment precision casting process, with excellent corrosion resistance (96-hour salt spray test) and mechanical strength (tensile strength ≥515MPa). Products cover ANSI, DIN, JIS and other standard specifications, the maximum diameter up to 2000mm, pressure class covering PN6-PN40, sealing surface processing accuracy of Ra1.6μm. The advantages of the process are as follows: 1) silica sol casting (7-layer shell) combined with vacuum casting, achieving a density of more than 98%; 2) Five-axis CNC machining to ensure that the bolt hole position ≤0.1mm; 3) 1050℃ solution treatment + pickling passivation double enhancement, with laser tracker (±0.05mm/m) and coordinate detection (±0.02mm) strict quality control. Widely used in harsh working conditions such as oil pipelines, nuclear power equipment and Marine systems, providing flange connection solutions with high sealing and long life.
Our advantage
1. Precision casting process
Investment casting: silica sol shell (7 layers of coating), shell temperature resistance 1600℃, casting surface finish Ra≤3.2μm.
Vacuum casting: reduce oxidation slag inclusion, casting density ≥98%, X-ray detection in accordance with ASTM E155 standards.
2. Numerical control processing technology
Large vertical lathe (machining diameter ≤2.5m) with five-axis linkage machining center, bolt hole position error ≤0.1mm.
The turning accuracy of the sealing surface is Ra1.6μm, and the flatness is less than 0.05mm/m.
3. Professional post-processing
Solution treatment: Water quenching at 1050℃ to eliminate stress and optimize corrosion resistance.
Pickling passivation: Removal of free iron ions, tested according to ASTM A967.
4. Whole process testing system
Size detection: laser tracker (±0.05mm/m) + coordinate measurement (key size ±0.02mm).
Pressure test: 1.5 times the working pressure water pressure/air tightness test.
Material analysis: spectrometer + metallographic microscope (inclusions grade ≤1.5).
Detail data
Application | Machinery Parts |
Material Type | Stainless steel |
Standard | CE, RoHS, ISO 9001:2000, ISO 9001:2008 |
Kind | Stainless Steel Casting |
Molding Technics | Casting |
Weight | 0.5kg~50kg |
FAQ
1.What is the Minimum Order Quantity?
5~1000 pcs. And we also accpet sample orders.
2. Can you manufacture according to customer's samples?
According to samples, we can make drawing, tooling and sample
3.How long will it take to make new samples according to customer's drawing or sample?
Totally 20 days. 10 days for tooling and another 10 days for sample.
