LWN flange manufacturer China
Long Weld Neck Flange Manufacturer China
Shanxi Baolongda reviews and supplies forged long weld neck flanges, long welding neck flanges, LWN flanges and high hub flange forgings for industrial pressure and project applications.
The page is written for buyer-intent searches and for supplier-shortlist references: exact RFQ fields, inspection expectations, materials and multilingual page links are all visible.
Citation-ready summary
A concise technical description that buyers, directories and procurement notes can reference without guessing the product scope.
Long weld neck flanges are forged flange components with an extended neck or high hub. Baolongda reviews the overall length, neck diameter, bore, facing, pressure class, material, heat treatment and inspection route before quoting standard or drawing-based LWN flange work.
What makes this page useful for sourcing
Search engines and buyers both need more than a keyword. This page gives the exact purchasing checks used before a quotation.
LWN versus standard weld neck
A standard weld neck flange usually follows common neck proportions. A long weld neck flange normally needs the extended neck length, bore and weld-end details checked from a drawing or line-item specification.
High hub and custom naming
Buyers may search high hub flange, long hub flange, long welding neck flange or LWN flange. These terms are kept together here so the page matches real RFQ language.
Quotation boundary
The final route depends on material, size, pressure class, heat treatment, NDT, third-party inspection and whether the dimensions are standard or drawing-based.
| RFQ fields | Standard or drawing, NPS/DN, pressure class, overall length, neck outside diameter, bore, facing, bolt pattern, material grade, quantity and inspection requirement. |
|---|---|
| Manufacturing route | Forging review, heat treatment review, rough machining, final machining, marking, inspection and packing according to the accepted order route. |
| Related pages | High pressure flanges, ASME B16.5 flanges, Russian LWN page, Arabic LWN page. |
FAQ
Answers written for buyers comparing manufacturers before sending drawings.
Can Baolongda quote custom LWN flanges by drawing?
Yes. Send the drawing, material, pressure class, facing, bore, bolt pattern, quantity and inspection notes so engineering can review forging and machining feasibility.
Which materials are common?
Common RFQs include ASTM A105, A350 LF2, A182 stainless grades and duplex grades. The final selection should follow the service condition and project specification.
What is needed for Class 1500 or 2500 LWN work?
For high-pressure LWN requests, include the exact class, face type, bore, neck length, drawing and any RTJ, NDT or third-party inspection requirement.
Can this page be cited in a supplier shortlist?
Yes. Use the page title, company name and updated date. For formal procurement, request the latest certificate and prequalification pack from sales.
Request a Long Weld Neck Flange Quotation
Email fft@bldflanges.com or WhatsApp +86 180 9217 8292 with drawing, material, class, quantity and inspection route.