BS 4504 316L Stainless Steel CNC Machine Viewport Flange Sight Glass
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| Customization: | Available |
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| Standard: | ANSI, DIN, GB, JIS, GOST, BSW |
| Type: | Welding Flange |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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| Secure payments: | Every payment you make on Made-in-China.com is protected by the platform. |
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| Refund policy: | Claim a refund if your order doesn't ship, is missing, or arrives with product issues. |
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Basic Info.
- Model NO.
- Flange Sight Glass
- Material
- Stainless Steel
- Structure
- Flanges
- Connection
- Welding
- Sealing Surface
- RF
- Manufacturing Way
- Forging
- Flange Type
- Viewport
- Executive Standard
- ANSI
- Payment Way
- T/T
- Shipping Way
- Sea Air Land
- Transport Package
- Wooden Box
- Specification
- DN15-DN2000
- Trademark
- SDFL
- Origin
- China
- HS Code
- 7307210000
- Production Capacity
- 500000
Packaging & Delivery
- Package Size
- 80.00cm * 70.00cm * 80.00cm
- Package Gross Weight
- 659.000kg
Product Description
High-Quality Forged Stainless Steel Flanges & Pipe Fittings
WE PRODUCE FORGED FLANGES -- Your Reliable Industrial Pipeline Partner
| Flange Type | Plate flange, Welding Neck Flange, Blind Flange, Threaded flange, Slip-on Flange, Socket Weld Flange, Sterilization pot flange, Flexible Joint Flange, Tube Sheet, large diameter flange, Press fitting flange, Pressure vessel flange, Lap Joint flange, Butterfly valve flange. |
| Size | DN15-DN1200, Max Outside Diameter: 6000mm |
| Pressure | 150#-2500#,PN0.6-PN400,5K-40K |
| Sealing Face | Raised Face (RF), Full Face (FF), Ring Joint (RTJ), Groove, Tongue - Customizable! |
| Standard | GOST 12820-80 / ANSI B16.5 / EN1092 / BS4504 / JIS B2220-2012 / DIN / AMSE B16.5 / UNI - Multi-standard Compliance! |
| Wall Thickness | SCH5S, SCH10S, SCH10, SCH40S,SCH20,SCH30,SCH40, SCH60, SCH80, SCH160 |
| Material | Stainless steel: A182F304/304L, A182 F316/316L, A182F321, A182F310S, A182F347H, A182F316Ti, 317/317L, 904L, 1.4301, 1.4307, 1.4401, 1.4571,1.4541, 254Mo and etc. Carbon steel: A105, A350LF2, S235Jr, S275Jr, St37, St45.8, A42CP, A48CP, E24 , A515 Gr60, A515 Gr 70 etc. |
| Duplex stainless steel: UNS31803, SAF2205, UNS32205, UNS31500, UNS32750 , UNS32760, 1.4462,1.4410,1.4501 and etc. Pipeline steel: A694 F42, A694F52, A694 F60, A694 F65, A694 F70, A694 F80 etc. |
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| Nickel alloy: inconel600, inconel625, inconel690, incoloy800, incoloy 825, incoloy 800H,C22, C-276, Monel400, Alloy20 etc. Cr-Mo alloy: A182F11, A182F5, A182F22, A182F91, A182F9, 16mo3,15Crmo, etc. |
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| Application | Widely used in Petrochemical Industry, Pharmaceutical Industry, Gas Exhaust Systems, Power Plants, Shipbuilding, Water Treatment, etc. |
| Surface treatment | Mill Finish / Sandblasting / Painting / Galvanizing / Marking |

Powering Global Supply Chains:
100+ State-of-the-Art Machines | 30 Metric Tons Daily Output
10,000+ Tons Annual Capacity - Bulk Orders Shipped in 15 Days.
Your Timeline, Our Priority: Mass Production Never Compromises Deadlines.
Zero MOQ Pressure: Start Your Project wiht Just 1 Piece - Prototyping to Bulk, We Scale with you.
Lightning-Fast Quotes: Get Pricing in 24 Hours.Your Time Matters,No Waiting Games.
From Concept to CAD: Free Technical Drawings & Engineering Support - Your Vision,Our Blueprint.
Worry-Free Global Shipping: CO,Form A & Export Certs Included - Customs Clearance Guaranteed.
Streamline Your Global Sourcing:
15-Year Export Expertise in Flange Solutions,
24/7 RFQ Processing with 24-Hour Quotes Guaranteed.
Eliminate Logistics Hassles - Precision Parts Delivered On-Spec, On-Time, Every Time.
Globally Certified, Locally Compliant:
CE Marked | ISO 9001 Audited | GOST-R Approved
Your Specifications, Our Obligation -
From Prototype to Bulk Order, We Guarantee Full Compliance with Your Regional Standards.
2. UT test
3. PT test
4. Size test
Before delivery, our QC team will arrange NDT testing and dimension inspection.
TPI (Third Party Inspection) is also accepted.
Relentless Precision, Unwavering Integrity:
Every Single Flange Individually Inspected
- Dimensional Accuracy Verified | Pressure-Tested to Spec -
Your Quality Control, Built into Our Production Line.

Step 1: Ultrasonic Cleaning & Surface Prep
Each flange/fitting undergoes ultrasonic degreasing, followed by manual wiping with lint-free cloths.
Step 2: Individual Protective Packaging
Bubble film wrapping + protective caps (optional per request).
Step 3: Reinforced Wooden Crating
Customized plywood boxes or pallets with steel reinforcement.
Large flanges (>DN500): Secured on fumigated plywood pallets with corner protectors.
Step 4: Traceability & Compliance Marking
Laser-engrave/print labels with: Product code, material grade, heat no., and your logo (OEM supported).
Step 5: Pre-Shipment Verification
Send 360° photos/video of packed crates for your approval before loading.
Q: Can you accept L/C deferred 30, 60, 90days?
A: We can.
Q: Can you supply invoice and CO with chamber of commerce?
A: Yes, we can supply.
Q: Can you supply Form e, Cerficiate of origin?
A: Yes, we can supply.
Q: Can you accept O/A payment?
A: We can.
Q: Can you supply samples?
A: Yes, some samples are free.
Q: Can you supply the products which comply with NACE?
A: Yes, we can.
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