Weld Neck Flanges

Product overview

Hua Chuang supplies weld neck flanges for industrial piping procurement. This page covers the weld neck flange type; use the separate slip-on, blind and plate flange pages when those types are specified in your bill of materials.

Purchase specification For a weld neck flange quotation, provide the flange standard and edition, DN or NPS, PN or Class, facing, material grade, mating pipe outside diameter and wall thickness. Include the required bore and weld-end details or a controlled drawing so the flange can be checked against the pipe connection.

Inspection, documents and packing State the required material documents, inspection scope, marking and packing in your RFQ. These items, any proposed alternatives and the delivery schedule should be confirmed in the written quotation and order. Do not assume optional tests or documents are included.

Preparing your enquiry Send an itemized quantity, destination country or port, requested delivery date and the drawing or bill of materials if available. For mixed orders, give each line its own specification so products and quantities remain traceable.

Frequently asked question Can I order from size and Class alone? Please also provide the material grade, applicable standard, facing and pipe wall or bore details. A nominal size and rating label alone do not define every connection dimension.

Specify the mating flange, nominal size, drilling pattern and facing together. A matching nominal size alone does not establish interchangeability between different flange standards. For weld neck flanges, include the pipe bore and wall thickness; for threaded designs, identify the thread standard. Select the gasket and bolting as part of the complete joint.

Technical specifications

Confirm the material grade, dimensions, pressure class and standard together against the approved drawing before ordering. Schedule denotes wall thickness, not a pressure rating.

Product information

• Forging process with reliable strength
• Complete material, size and pressure levels
• Strict quality inspection, full traceability
• Meets ASME, DIN, JIS, GOST standards

Prepare a clear request for quotation

Send a bill of materials or drawing with item quantities, material grades, dimensions, standard and edition, inspection documents, packing and destination. Identify any requirements that still need technical review.

Procurement questions