Recurso	ASME B16.5	ASME B16.47
Faixa de tamanho	½ to 24 polegadas	26 para 60 polegadas
Aulas de pressão	150 para 2500	150 e 300
Aplicativo	Small to medium piping	Large diameter piping
Flange types	Many types	Blind and weld neck only
Furos de parafusos	More densely spaced	Fewer bolts for Series B
Força	Balanced	Higher for Series A

Understanding these differences ensures proper selection in engineering design.

Por que 316 Stainless Steel Is Commonly Used

316 stainless steel contains chromium, níquel, e molibdênio, giving it outstanding resistance to:

• Chloride corrosion

• Seawater pitting

• High temperature oxidation

• Chemical attack

• Ácidos e álcalis

Essas propriedades fazem 316 flanges suitable for harsh environments such as offshore platforms, usinas de dessalinização, and chemical processing facilities.

Requirements for 316 Stainless Steel Flanges Under ASME B16.5 e B16,47

Material Requirements

316 stainless steel must meet chemical and mechanical requirements defined in ASTM A182 F316.

Dimensional Requirements

Both standards define:

• Outside diameter OD

• Diâmetro do círculo do parafuso

• Espessura do flange

• Hub height for weld neck flanges

• Bore size tolerances

• Bolt hole alignment

• Serrated facing finish

Accurate dimensions ensure leak free sealing and proper bolt load distribution.

Facing Types Defined in ASME Standards

ASME B16.5 and B16.47 include several flange facing options:

RF de face elevada

• Most common type

• Provides smooth, reliable gasket sealing

Face plana FF

• Used for cast iron equipment connections

Junta tipo anel RTJ

• Used in high pressure and high temperature applications

• Preferred for offshore and refinery environments

RTJ flanges require precise groove machining for metal ring joint gaskets.

Pressure Temperature Ratings

Temperature significantly affects allowable pressure. ASME standards define charts showing pressure limits at various temperatures for 316 aço inoxidável.

Example for Class 150, 316 Aço inoxidável

• At 100°F: 275 psi

• At 600°F: 150 psi

Higher classes offer proportionally higher limits.

Testing Requirements for ASME Flanges

To ensure reliability, 316 stainless steel flanges produced by sasa oblonga must pass:

• Inspeção visual

• Chemical analysis per ASTM A182

• Mechanical property testing

• Teste de pressão hidrostática

• Non destructive testing UT or PT when requested

• Inspeção dimensional

• Surface roughness measurement

Strict inspection ensures compliance with ASME standards.

Marking and Traceability Requirements

Ambos ASME B16.5 and B16.47 require clear marking on each flange.

Typical markings include:

• Grau do material: F316

• Padrão: ASME B16.5 ou B16.47

• Classe de pressão

• Tamanho

• Número de calor

• Logotipo do fabricante

• País de origem

Traceability ensures quality management throughout the supply chain.

Applications of ASME Standard 316 Flanges de aço inoxidável

316 stainless steel flanges are used in:

• Oleodutos e gasodutos

• Plataformas de perfuração offshore

• Petrochemical processing

• Reatores químicos

• Marine and desalination systems

• Pharmaceutical production lines

• Steam and high temperature piping

Their corrosion resistance and strength make them one of the most versatile materials in industrial piping.

Advantages of Using ASME Compliant 316 Flanges

• Guaranteed dimensional compatibility

• Desempenho de vedação confiável

• High resistance to corrosion and pitting

• Long service life in harsh environments

• Approved by global engineering codes

• Full documentation for project bidding

Using ASME compliant flanges ensures system safety and reduces maintenance costs.

Why Choose SasaFlange for ASME B16.5 and B16.47 Products

Fabricantes como sasa oblonga fornecer:

• Full compliance with ASME standards

• Advanced forging and CNC machining

• Strict material certification EN10204 3.1

• Precision surface finish and accurate dimensions

• Wide range of pressure classes and sizes

• Custom machining and project support

With a strong focus on quality control, the company supplies high precision 316 stainless steel flanges to global markets.

Conclusão

ASME B16.5 e ASME B16.47 are essential standards for ensuring the safety, compatibilidade, and performance of 316 stainless steel flanges used in industrial piping systems. Understanding the differences between these two standards helps engineers make informed decisions when selecting flange types, tamanhos, and pressure classes for specific applications. Supported by proper material certification, strict testing, and precise manufacturing, ASME compliant 316 flanges deliver long term reliability in demanding environments. Como um fornecedor confiável, sasa oblonga provides high quality stainless steel flanges that meet these standards and support industrial operations worldwide.