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Olets | Forged Branch Outlet Fittings for Industrial Piping Systems

DTC-OLETS-SS/CS Series

DTC supplies forged branch outlet fittings (Olets) including Elbolet, Latrolet, Nipolet, and Sweepolet for customized branch connections in industrial piping systems. Manufactured according to MSS SP-97 standards, available in carbon steel, stainless steel, and alloy steel.

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Detailed Introduction

Forged Olets for Customized Branch Connections

Olets, also known as branch outlet fittings, are specially designed forged fittings used to create branch connections from a main pipeline. Unlike conventional tee fittings, olets provide a reinforced and compact solution for connecting smaller branch pipes to larger run pipes while reducing stress concentration.

Olets are widely used in oil & gas, petrochemical, chemical processing, power generation, and industrial piping systems, especially where space limitations, high pressure, or customized branch connections are required.

In addition to common outlet fittings such as Weldolet, Sockolet, and Threadolet, DTC supplies various specialized olets including:

  • Elbolet
  • Latrolet
  • Nipolet
  • Sweepolet

These products provide flexible solutions for different branch connection requirements.


Key Features of DTC Olets

Reinforced Branch Connection

The forged body design provides reinforcement around the branch opening, improving mechanical strength and service reliability.

Space-Saving Design

Compared with conventional tee fittings, olets require less installation space and reduce material consumption.

Improved Stress Distribution

The contoured base design matches the run pipe, reducing stress concentration at the branch connection.

Suitable for Critical Piping Systems

Forged olets are commonly used in high-pressure, high-temperature, and corrosive environments.

Multiple Connection Options

Available connection types:

  • Butt weld
  • Socket weld
  • Threaded
  • Custom connections

Technical Specifications

Item Description
Product Name Forged Olets / Branch Outlet Fittings
Types Elbolet, Latrolet, Nipolet, Sweepolet
Standard MSS SP-97 / ASME B16.11
Manufacturing Method Forged
Material Carbon Steel, Stainless Steel, Alloy Steel
Pressure Rating Class 3000, 6000, 9000
Size Range Customized according to requirements
Connection Type Butt Weld / Socket Weld / Threaded
Surface Finish Black, Galvanized, Customized
Inspection EN10204 3.1 MTC Available

Types of Olets

Elbolet

An Elbolet is a branch outlet fitting designed specifically for installation on elbows.

It provides a reinforced branch connection where a direct outlet from an elbow is required.

Advantages:

  • Suitable for elbow branch connections
  • Maintains smooth flow transition
  • Reduces fabrication requirements

Applications:

  • Instrument connections
  • Drain and vent lines
  • Process piping systems

Latrolet

A Latrolet is a lateral branch outlet fitting designed for angled branch connections, usually at 45 degrees.

It provides a more efficient flow path compared with standard 90-degree branch connections.

Advantages:

  • Reduced turbulence
  • Better flow characteristics
  • Suitable for angled branches

Applications:

  • Process piping
  • Chemical systems
  • High-flow applications

Nipolet

A Nipolet is a forged outlet fitting combined with an extended nipple, providing a compact connection between the main pipe and branch pipe.

Advantages:

  • Reduced welding work
  • Compact structure
  • Easy installation

Applications:

  • Instrument piping
  • Small branch connections
  • Utility systems

Sweepolet

A Sweepolet is a contoured branch outlet fitting designed with a smooth transition between the run pipe and branch pipe.

Advantages:

  • Excellent flow characteristics
  • Reduced turbulence
  • Lower stress concentration

Applications:

  • High-flow pipelines
  • Power plants
  • Process piping systems

Common Materials

Carbon Steel Olets

Typical grades:

  • ASTM A105
  • ASTM A350 LF2

Applications:

  • Oil pipelines
  • Gas systems
  • Steam piping
  • General industrial applications

Stainless Steel Olets

Typical grades:

  • ASTM A182 F304
  • ASTM A182 F316
  • 304L / 316L

Applications:

  • Chemical processing
  • Pharmaceutical systems
  • Food industry
  • Corrosive media

Alloy Steel Olets

Typical grades:

  • ASTM A182 F11
  • ASTM A182 F22
  • ASTM A182 F91

Applications:

  • High-temperature piping
  • Boiler systems
  • Power generation

Applications of Forged Olets

DTC forged olets are widely used in:

  • Oil & Gas Industry
  • Petrochemical Plants
  • Refineries
  • Chemical Processing
  • Power Generation
  • Shipbuilding
  • Offshore Engineering
  • Industrial Manufacturing

Typical services:

  • Oil
  • Gas
  • Steam
  • Water
  • Chemical fluids

Olets vs Tee Fittings

Feature Olets Tee Fittings
Installation Added to existing pipe Installed during pipeline construction
Space Requirement Compact Larger
Material Usage Lower Higher
Branch Size Flexible branch connection Standard sizes
Application Pipeline modification New piping systems

Olets vs Fabricated Branch Connections

Feature Forged Olets Fabricated Branch
Manufacturing Forged component Welded fabrication
Strength Higher Depends on fabrication quality
Stress Distribution Better Higher stress concentration
Installation Easier More complex
Reliability Higher Variable

Why Choose DTC Olets?

Complete Branch Connection Solutions

DTC supplies a complete range of branch outlet fittings:

  • Weldolet
  • Sockolet
  • Threadolet
  • Elbolet
  • Latrolet
  • Nipolet
  • Sweepolet

Wide Material Capability

Available:

  • Carbon steel
  • Stainless steel
  • Alloy steel
  • Low-temperature steel

OEM & Customized Manufacturing

DTC supports:

  • Custom dimensions
  • Special outlet sizes
  • Non-standard materials
  • Customer logo marking
  • Project specifications

Quality Documentation

Available documents:

  • EN10204 3.1 Material Certificate
  • Chemical Composition Report
  • Mechanical Test Report
  • Dimensional Inspection Report
  • Third-party Inspection

Frequently Asked Questions (FAQ)

What are olets in piping?

Olets are forged branch outlet fittings used to connect branch pipes to a main pipeline with improved reinforcement and stress distribution.

What types of olets does DTC supply?

DTC supplies Elbolet, Latrolet, Nipolet, Sweepolet, as well as Weldolet, Sockolet, and Threadolet.

What standards do olets follow?

Most forged olets are manufactured according to MSS SP-97 and ASME B16.11 standards.

What materials are available for olets?

Common materials include carbon steel, stainless steel, alloy steel, and low-temperature steel.

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