凸面法兰供应商 低碳钢批量订购 便宜价格指南

Raised Face Flange Stockist and Mild Steel Bulk Order Guide

Finding reliable raised face flange stockists with competitive pricing for bulk orders is essential for project procurement. This guide covers stock availability, bulk pricing, and cost-saving strategies.

Raised Face Flange Overview

Raised face (RF) is the most common flange facing type in industrial applications:

RF Face Dimensions

• Class 150 and 300: 1.6mm (1/16 inch) raise
• Class 400 and higher: 6.4mm (1/4 inch) raise
• Serrated finish: 3.2-6.3 microns Ra
• Concentric or spiral serrations

Gasket Compatibility

• Non-asbestos sheet gaskets
• Spiral wound gaskets
• Graphite gaskets
• PTFE gaskets
• Rubber gaskets for low pressure

廉价低碳钢法兰批量订购

Mild steel flanges offer the most cost-effective solution for non-critical applications:

材料等级

标准	等级	地区
Chinese	Q235	China
Japanese	SS400	Japan/Asia
European	S235JR	Europe
American	A36	USA

Cost Comparison by Material

• Mild steel (Q235/SS400): Base price 100 percent
• Carbon steel (A105): Plus 15-20 percent
• Stainless 304: Plus 60-80 percent
• Stainless 316: Plus 100-120 percent

Bulk Order Pricing Tiers

数量	折扣	益处
10-50 件	5-10 percent	Standard packaging
50-100 件	10-15 percent	Priority production
100-500 件	15-25 percent	Free inspection
500 plus pieces	25-35 percent	Dedicated support

DN100 法兰供应商规格

DN100 (NPS 4) is one of the most commonly ordered flange sizes:

ASME B16.5 150 级

• Outside Diameter: 229mm
• Bolt Circle: 191mm
• Bolt Holes: 8 times 19mm
• Flange Thickness: 20.6mm
• 重量约 3.8 千克

EN 1092-1 PN16

• 外径：220 毫米
• 螺栓圈：180 毫米
• Bolt Holes: 8 times 18mm
• 法兰厚度：20 毫米
• 重量约 3.5 千克

带 CE 认证的出口法兰

European exports require comprehensive certification:

认证要求

• CE Marking mandatory
• PED 2014/68/EU compliance
• Notified Body involvement
• 技术文件
• 合格声明

Testing Requirements

• Material verification per heat
• 尺寸检查
• 压力测试
• Non-destructive testing

Stock Availability by Type

Commonly Stocked Items

• Carbon steel A105: All sizes DN15-DN600
• Stainless 304/316: DN15-DN300
• Mild steel Q235: DN15-DN400
• Blind flanges: All common sizes

Made to Order

• Alloy steel flanges
• Duplex and super duplex
• Large diameter DN700 plus
• 特殊压力等级
• Custom drilling patterns

Carbon Steel Flange Suppliers Selection

Key Selection Criteria

1. Manufacturing capabilities and capacity
2. Quality certifications (ISO, CE, PED)
3. Material traceability (MTR available)
4. Production lead times
5. Export experience
6. After-sales support

Red Flags to Avoid

• No material test reports
• Unrealistically low prices
• No quality certifications
• Poor communication
• No references or reviews

Stainless Steel Flange Manufacturers

Global manufacturing regions for stainless flanges:

By Country

• China: Largest producer, competitive pricing
• India: Growing capacity, good quality
• Italy: Premium quality, higher cost
• USA: Domestic supply, quick delivery
• Japan: High precision, excellent quality

Shipping and Logistics

• 海运：20-35 天到达主要港口
• Air freight: 5-7 days for urgent orders
• 铁路货运：至欧洲 15-20 天
• Container optimization available

付款条款

• T/T: 30 percent deposit, 70 percent before shipment
• 大额订单见票即付
• Trade Assurance available
• Flexible terms for repeat customers

Songhai Flange is a professional raised face flange stockist with CE certification for export. We offer competitive pricing for mild steel bulk orders and maintain stock of common sizes for quick delivery.

WhatsApp： +86-18658777855
电子邮件： 1007788887@qq.com

WhatsApp： +86-18658777855
电子邮件： 1007788887@qq.com