Question 1

What pressure ratings are available for SHIELD industrial flanges?

Accepted Answer

SHIELD industrial flanges are available in pressure ratings from Class 150 to Class 2500, with Blind flanges available up to Class 9000. Welding Neck flanges support Class 150 to 2500, Slip-On flanges support Class 150 to 900, Socket Weld flanges support Class 150 to 3000, Lap Joint flanges support Class 150 to 1500, and Threaded flanges support Class 150 to 2500.

Question 2

What materials are SHIELD industrial flanges made from?

Accepted Answer

SHIELD industrial flanges are manufactured in Stainless Steel 304/316/L, Duplex Stainless Steel 2205/2507, Carbon Steel and Alloy Steel. Duplex 2507 is specifically recommended for corrosive chemical and marine environments. Full material traceability is provided for every flange.

Question 3

What flange standards does SHIELD comply with?

Accepted Answer

SHIELD industrial flanges comply with ASME B16.5, ASME B16.47, ANSI B16.5, DIN 2631-2638, DIN 2573-2576, DIN 2527, DIN 2632-2638, ASME B1.20.1, EN 1092 and other international standards. Testing is performed per ASTM and EN 10204 3.1 / 3.2.

Question 4

What is the size range of SHIELD flanges?

Accepted Answer

SHIELD flange size range is 1/2" to 60" (DN15 to DN1500). Welding Neck: 1/2" to 60"; Slip-On: 1/2" to 24"; Blind: 1/2" to 60"; Socket Weld: 1/2" to 4"; Lap Joint: 1/2" to 24"; Threaded: 1/8" to 4".

Question 5

What is the difference between forged flange and cast flange?

Accepted Answer

Forged flanges are formed by hammering or pressing heated metal, resulting in a denser grain structure, higher strength, better impact resistance and improved fatigue performance. Cast flanges are produced by pouring molten metal into a mold, which may result in porosity and lower mechanical properties. For high-pressure and high-temperature critical service, SHIELD recommends forged flanges.

Question 6

What is the difference between slip-on flange and welding neck flange?

Accepted Answer

Welding Neck flanges have a tapered hub and are butt-welded to the pipe, providing superior strength for high-pressure and high-temperature applications. Slip-On flanges slide over the pipe and are fillet-welded on both sides, offering lower cost and easier alignment for low to medium pressure services typically up to Class 600.

Question 7

Do you provide custom flanges according to drawing?

Accepted Answer

Yes. SHIELD provides custom flanges according to drawing specifications for non-standard applications, including Orifice, Expander and Reducing flanges. Please send us your drawing, material, pressure class and quantity requirements for a detailed quotation.

Question 8

Which industries use SHIELD industrial flanges?

Accepted Answer

SHIELD industrial flanges are widely used in chemical processing, marine and offshore, oil and gas, petrochemical refining, power generation, water treatment and other critical piping systems requiring reliable, leak-free connections.