TOBO STEEL GROUP CHINA
| Craft | Seamless Or Welded,butt Weld |
| Facing | RF |
| Types | flange |
| Payment Terms | T/T, Western Union |
| Size | 1/2''-120'' dn10 to dn3600 |
| Temperaturerange | -50°C to 600°C |
| Pplicable For | Medium Pressure(Gas, Liquid, Dust) |
| Delivery Time | 15-30 Workdays |
| Type | Flange |
| Keyword | Steel |
| Supply Ability | 10 Ton/Month |
| Product Name | Forged Steel Socket Welding Flange ASTM A105 ANSI Class 150 RF |
| Face Type | Raised Face, Flat Face, Ring Type Joint |
| Flange Surface | FF RF TG RJ |
| Productname | Forged Steel Flanges |
| Class Rating | 150~2500# |
| Packaging Details | Standard Shipping Package |
| Shape | Equal |
| Payment | T/T or others |
| Package | wooden boxes |
| Model Number | Forged Steel Flanges |
| Brand Name | TOBO |
| Certification | ISO/TUV/SGS |
| Place of Origin | Shanghai,China |
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Product Specification
| Craft | Seamless Or Welded,butt Weld | Facing | RF |
| Types | flange | Payment Terms | T/T, Western Union |
| Size | 1/2''-120'' dn10 to dn3600 | Temperaturerange | -50°C to 600°C |
| Pplicable For | Medium Pressure(Gas, Liquid, Dust) | Delivery Time | 15-30 Workdays |
| Type | Flange | Keyword | Steel |
| Supply Ability | 10 Ton/Month | Product Name | Forged Steel Socket Welding Flange ASTM A105 ANSI Class 150 RF |
| Face Type | Raised Face, Flat Face, Ring Type Joint | Flange Surface | FF RF TG RJ |
| Productname | Forged Steel Flanges | Class Rating | 150~2500# |
| Packaging Details | Standard Shipping Package | Shape | Equal |
| Payment | T/T or others | Package | wooden boxes |
| Model Number | Forged Steel Flanges | Brand Name | TOBO |
| Certification | ISO/TUV/SGS | Place of Origin | Shanghai,China |
| High Light | ASTM A105 forged steel flange ，ANSI Class 150 socket welding flange ，RF forged steel welding flange | ||
Forged Steel Socket Welding Flange ASTM A105 ANSI Class 150 RF
1. Product Description
Forged steel flanges are pressure‑containing components produced by hot forging from killed steel, ensuring a fully dense, fine‑grained structure. They meet ASME, EN, JIS, DIN, and GB standards. Available in carbon, alloy, and stainless steels, with all common types and facing finishes.
2. Product Applications
Oil & Gas – wellheads, pipelines, refineries
Chemical & Petrochemical – reactors, heat exchangers
Power Generation – boilers, steam lines, nuclear
Shipbuilding & Offshore – deck piping, subsea
Water & Wastewater – treatment plants, desalination
Pharma & Food – sanitary lines, sterile systems
Suited for steam, hydrocarbons, acids, cryogenic fluids, and high‑purity media.
3. Product Advantages
✔ Stronger – Up to 30% higher tensile strength than cast equivalents.
✔ Tougher – Fine grain ensures superior impact resistance at low temperatures.
✔ Leak‑tight – Precision faces (Ra ≤ 3.2 µm) ensure reliable gasket sealing.
✔ Durable – Excellent corrosion and erosion resistance prolongs service life.
✔ Traceable – Each piece marked with heat number, full documentation available.
4.Key Technical Parameters
| Item | Quick Reference Data |
| Standards | ASME B16.5 (≤24″), B16.47 (≥26″); EN 1092 1; DIN; JIS; GB |
| Sizes | NPS ½″ to 120″ (DN 15–3000) |
| Pressure ratings | Class 150, 300, 600, 900, 1500, 2500 (equiv. PN 20–420) |
| Temperature range | –196°C to +600°C (derate per standard) |
| Common materials | • Carbon: A105 (general), A350 LF2 (low-temp) • Alloy: F11/F22 (450–550°C), F91 (≤600°C) • Stainless: F304/F316L (corrosion-resistant) |
| Flange types | WN (weld neck), SO (slip-on), BL (blind), SW (socket weld), THRD (threaded), LJ (lap joint), Orifice |
| Face styles | RF (raised face) – most common; FF (flat); RTJ (ring joint) – high pressure; MF / TG – special |
| Bolting (typical) | Studs: ASTM A193 B7/B8; Nuts: A194 2H/8M. Quantities per ASME B16.5. |
| Inspection | PMI 100%, MT/PT standard, UT optional, hydrotest 1.5× design pressure |
| Certificates | EN 10204 Type 3.1 (standard), Type 3.2 (third-party witness) |
FAQ
1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.
2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
Company Details
Business Type:
Manufacturer,Agent,Importer,Exporter,Trading Company,Seller
Year Established:
1998
Total Annual:
100000-100000000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ... TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area ...
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