Carbon Steel Flange Suppliers Guide ASTM A105 Price and Dimensions

Carbon Steel Flange Suppliers Selection Guide

When searching for carbon steel flange suppliers near you, understanding material specifications, pricing factors, and dimensional standards ensures you get quality products at competitive prices.

ASTM A105 Flange Overview

ASTM A105 is the most common carbon steel material for forged pipe flanges, offering excellent mechanical properties and cost-effectiveness for general industrial applications.

Key Specifications

• Material: ASTM A105 forged carbon steel
• Pressure Classes: Class 150, 300, 600, 900, 1500, 2500
• Standards: ASME B16.5, ASME B16.47
• Temperature Range: -20°F to 800°F (-29°C to 427°C)
• Tensile Strength: 70,000 psi minimum

ANSI Class 150 Flange Dimensions

NPS	DN	OD (mm)	Bolt Circle (mm)	Bolzen	Weight (kg)
1/2″	15	89	60	4	0.5
1″	25	108	79	4	0.8
2″	50	152	121	4	1.6
4″	100	229	191	8	3.8
6″	150	279	241	8	5.9
12″	300	483	432	12	18.2

PN16 Welded Flange Specifications

PN16 flanges are commonly used in European and Asian markets for water, air, and low-pressure process applications.

• Pressure Rating: 16 bar at 120°C
• Standard: EN 1092-1, GB/T 9115
• Material: P235GH, P245GH, Q235, 20#
• Types: Plate flat weld, neck welded

Pricing Factors

Material Cost

• Raw steel prices fluctuate with market conditions
• ASTM A105 typically 20-30% cheaper than stainless
• Bulk orders receive significant discounts

Manufacturing Cost

• Forged flanges cost more than cut plate
• Custom sizes require additional machining
• Heat treatment and testing add to cost

Surface Treatment

• Black paint: Standard, lowest cost
• Galvanized: +15-20% cost
• Epoxy coating: +25-30% cost

Wholesale and Bulk Order Benefits

For large diameter flange fabrication and bulk orders:

• MOQ: Typically 10-50 pieces per size
• Volume discount: 10-25% for large quantities
• Custom drilling patterns available
• Lead time: 15-30 days for standard items

Quality Certifications

• CE Certification: Required for European export
• PED 2014/68/EU: Pressure Equipment Directive
• ISO 9001: Quality management system
• MTR: Material test report per heat

Common Applications

• Water treatment plants
• HVAC systems
• Fire protection piping
• Oil and gas pipelines
• Chemical process piping
• Power generation

How to Choose a Reliable Supplier

1. Verify manufacturing capabilities and certifications
2. Request material test reports
3. Check production lead times
4. Review quality control procedures
5. Compare pricing including shipping
6. Ask about after-sales support

Songhai Flange supplies ASTM A105 carbon steel flanges with CE certification for global export. Contact us for competitive wholesale pricing and custom fabrication services.

WhatsApp: +86-18658777855
E-Mail: 1007788887@qq.com