Zhejiang Yuhao Stainless Steel Co., Ltd
                                                                                                           
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8 Years
Since 2018
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Stainless Steel Weld Neck Flange JIS RF 1/2" to 24" Class150-2500

Price Negotiable
Price: Negotation
MOQ: 100KGS
Delivery Time: 2-10 work days
Brand: Yuhao
Product Description
Stainless Steel Weld Neck Flange JIS RF Class150-2500 (1/2" to 24")
Product Specifications
Attribute Value
Material 304, 304L, 306, 306L, 316, 316L
Application Connection, Decoration, Oil and Gas, Automotive, New Energy
Standard ASTM, AISI, GB, JIS
Flange Face Type RF (Raised Face), RTJ (Ring Type Joint)
Package Standard Seaworthy Packaging, Wooden Cases
Certification ISO, API, BV, CE
Connection Welding
Pressure Class150/300/600/9001500/2500
Dimensions 1/2", 2", 3", 4", 6", 8", 10", up to 24"
Brand Name Yuhao
Product Description
A weld neck flange features an extended, tapered hub designed for butt welding to pipes or fittings. This welding technique ensures precise alignment and full penetration at the junction, creating a strong, permanent connection. The tapered hub provides smooth stress transition between flange and pipe, minimizing deformation, fatigue, or mechanical failure under demanding conditions.
Commonly used in high-pressure industries including oil and gas transmission, petrochemical facilities, and power plants, weld neck flanges perform reliably in extreme conditions. Available in various materials including carbon steel, stainless steel, and alloy steels to meet operational requirements and comply with industry regulations.
Product Dimensions
DN Pipe OD Connection Size Flange Thickness (mm) C Flange ID
10 17.2 14 90 60 14
15 21.3 18 95 65 14
20 26.9 25 105 75 16
25 33.7 32 115 85 16
32 42.4 38 140 100 18
40 48.3 45 150 110 18
50 60.3 57 165 125 19
65 76.1 76 185 145 20
80 88.9 89 200 160 20
100 114.3 108 220 180 22
125 139.7 133 250 210 22
150 168.3 159 285 240 24
200 219.1 219 340 295 24
250 273 273 395 350 26
300 323.9 325 445 400 26
350 355.6 377 505 460 28
400 406.4 426 565 515 32
450 457 480 615 565 36
500 508 530 670 620 38
600 610 630 780 725 42
Product Images
Close-up view of stainless steel weld neck flange connection Side view of weld neck flange showing tapered hub design Multiple weld neck flanges in different sizes
Frequently Asked Questions
What is the delivery time?
1-7 days for small orders. 10-20 days for large orders.
What products and services do you supply?
We supply various metal raw materials and products, including pipes, pipe fittings, flanges, coils, sheets, round bars, and more.
How is the product quality ensured?
Quality is our priority. Every product undergoes thorough assembly and testing before packaging and shipment.
What is your minimum order quantity?
MOQ varies by product. Please refer to the product details page or contact us with specific inquiries.
What is your production lead time?
Typically 5-10 days for in-stock items. For custom orders, production takes 15-20 days depending on quantity.

Get in Touch

Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Zhejiang Yuhao Stainless Steel Co., Ltd
Location NO.81, LIUZHAI SECTION, LUODONG SOUTH ROAD, YONGZHONG STREET, LONGWAN DISTRICT, WENZHOU, CHINA
Contact Person Department 1

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