A105 Class 150 Flanges

A105 Class 150 flange is affordable, versatile, and widely used in low-pressure, non-cryogenic applications. However, it is not suitable for high-pressure, low-temperature, or highly corrosive environments without additional protection.

flensa leher las 150# a105

ASTM A105 Class 150 Flange Manufaturer

SSM memproduksi ASTM A105 Class 150 flanges using high-quality forged carbon steel. These flanges are designed to provide reliable sealing and connection for pipelines and equipment in demanding applications. They are widely used in oil & gas, petrochemical, chemical processing, marine, and power generation industries.

Specifications of ASTM A105 Class 150 Flanges:

  • Kisaran Ukuran: 1/2″ to 24″ (DN15 to DN600)
  • Peringkat Tekanan: Class 150 (working pressure up to ~285 psi at room temperature)
  • Facing Types: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)
  • Standar: ASME B16.5 (up to 24″), MSS SP-44 (large diameter), API 6A (oil & gas applications)
  • Bahan: ASTM A105 Carbon Steel Forging
  • Jenis: Weld Neck, Slip-On, Socket Weld, Lap Joint, Threaded, and Blind Flanges (with RF/FF/RTJ Facing)
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ASTM A105 Class 150 Flange Dimensions (ASME B16.5)

Dimensi Flensa Kelas 150 ASME B16.5

Dimensi Flensa Kelas 150 ASME B16.5 Dalam Milimeter

Dimensi Flensa Kelas 150 ASME B16.5 dalam Inci

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Advantages & Disadvantages of A105 Class 150 Flange

A105 Class 150 flanges are economical, widely available, and suitable for low- to medium-pressure applications in oil & gas, water, and general utility service.

However, they have limited pressure and temperature resistance, poor low-temperature toughness, and require protection against corrosion.

A105 Blind Flange Application

  • Pipa minyak dan gas
  • Water and steam lines
  • Refinery & chemical process piping
  • General utility service at low to medium pressures
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One-Stop A105 Class 150 Flange Provider for All Your Needs

SSM has significant product advantages in manufacturing A105 Class 150 Flanges. Whether it’s quality or price, we will meet your needs.

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More Information About A105 Class 150 Flange

Pressure Rating – Class 150

Kelas 150 is a pressure-temperature rating defined by ASME B16.5.

It does not mean 150 psi exactly — the actual pressure capacity depends on material and temperature.

Untuk ASTM A105 (Group 1.1 material, carbon steel) under ASME B16.5:

  • At –29 °C to 38 °C (–20 °F to 100 °F), max working pressure ≈ 285 psi (≈ 19.6 bar).
  • Pressure rating decreases as temperature increases (e.g., ~260 psi at 200 °F, ~185 psi at 400 °F).

Common Types of A105 Class 150 Flanges

  • Flensa Leher Las (WN) – for high integrity welded joints
  • Blind Flange (BL) – to close ends of piping systems
  • Flensa Selip (SO) – economical, easy to install
  • Flensa Las Soket (SW) – for small-diameter, high-pressure service
  • Threaded Flange (THD) – for non-welded connections
  • Lap Joint Flange (LJ) – used with stub ends for easy disassembly

Tanya Jawab Umum

  • Raised Face (RF) and Flat Face (FF) are most common. Ring Type Joint (RTJ) is generally used for higher-pressure classes, but it can also be specified.

No, A105 is not recommended below –20 °C. For cryogenic/low-temperature service, ASTM A350 LF2 or other low-temperature grades should be used.

Yes, carbon steel A105 is prone to corrosion. They are usually coated (black oxide, galvanization, painting) or protected with anti-rust oil during storage and transport.

With over 30 years of experience, SINO SPECIAL METAL (SSM) is a trusted manufacturer and supplier of ASTM A105 Class 150 flanges:

  • Production Capability: Specializes in carbon steel forged flanges (ASTM A105 / A105N), fully compliant with ASME / MSS standards.
  • Harga Kompetitif: Direct factory supply with cost-effective solutions for large-volume orders.
  • Quality Assurance: 100% PMI material testing, strict dimensional accuracy, and EN 10204 3.1/3.2 MTC certification available.
  • Fast Delivery: Standard Class 150 flanges in stock; customized orders delivered within 15–30 days.
  • Comprehensive Service: Third-party inspection, export-standard packaging, and worldwide delivery.

Choose SSM for reliable, high-quality ASTM A105 Class 150 flanges – we look forward to being your trusted partner!

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