Weldolet Butt Weld Branch Outlet

Weldolet – Forged Butt Weld Branch Outlet Fitting

Our Weldolet is hot forged reinforced branch fitting with butt weld outlet, welded onto main pipe wall to create high-strength pipeline tapping branches. Produced strictly following MSS SP-97 & ASME B16.11 standards, all sizes keep full nominal dimension without minus tolerance, widely used for power, petrochemical, oil & gas large-bore instrument piping.

Overview

Weldolet (Butt Weld Olet) is a one-piece hot forged reinforcing branch saddle fitting, belonging to Olet series fittings defined by MSS SP-97 standard. Different from Sockolet, its branch end adopts butt weld connection for large diameter branch pipelines. Instead of cutting standard tees on main pipe, weldolet’s thickened saddle structure strengthens the pipe wall tapping position, greatly improving pressure bearing capacity and pipeline safety, widely applied for high-pressure large-bore process pipelines.

Integrally hot forged from carbon steel A105 or stainless steel A182 F304/F316L, uniform thick wall design for heavy load working conditions. We strictly control all dimensional parameters, guarantee zero minus tolerance on wall thickness and outer diameter, no thin-wall material cutting corners. Three standard pressure classes (3000LB / 6000LB / 9000LB) to match diverse high-pressure industrial working environments.

Core Key Features

Integral hot forging molding, thickened saddle reinforcement, ultra-high pressure & impact resistance
Butt weld branch outlet, full penetration welding, stable sealing for large-diameter branch pipelines
Dual standard compliance: MSS SP-97 (Olet branch fittings) & ASME B16.11 (forged fitting standard)
Available materials: Carbon Steel A105; Stainless Steel A182 F304 / F316L for corrosive media
Wide size range: Main pipe OD 1/2″ ~ 48″, branch size DN15 ~ DN1200 (1/2″ ~ 48″)
Zero minus tolerance for all dimensions, full standard nominal size without thin-wall cutting
Smooth inner flow channel, low fluid resistance, no medium stagnation dead zone
Full MPI magnetic particle inspection + hydrostatic pressure test before shipment, complete MTC material certificates provided

Technical Specification

Item	Technical Parameter
Product Name	Weldolet / Butt Weld Branch Outlet
Connection Type	Run end: Fillet weld on main pipe; Branch end: Butt Weld (BW)
Production Craft	Hot Forged Integral Forming
Executive Standards	MSS SP-97, ASME B16.11, ASME B31.3
Raw Material	Carbon Steel A105; Stainless Steel A182 F304 / F316L
Pressure Class	Class 3000, Class 6000, Class 9000
Main Pipe Size Range	1/2″ ~ 48″
Branch Size Range	1/2″ ~ 48″ (DN15 ~ DN1200)
Wall Schedule	Sch80, Sch160, XXS, Custom wall thickness
Dimensional Tolerance	Full standard nominal size, zero minus tolerance
Inspection Items	MPI Magnetic Particle Test, Hydrostatic Test, Full Dimension Inspection
Surface Treatment	Black anti-rust paint (Carbon Steel); Pickling & Passivation (Stainless Steel)

Application

Our forged weldolet branch outlets are core fittings for heavy-duty large-bore high-pressure piping systems:

Thermal power plant main steam pipeline instrument sampling branches
Petrochemical refinery high-pressure process pipeline tapping connections
Oil & gas transmission trunk line wellhead measuring branch piping
Offshore marine platform anti-corrosion high-pressure pipeline branches
Large hydraulic equipment heavy load branch connection
Fire protection large-diameter pressure pipeline tapping
Pharmaceutical & food stainless steel clean process pipeline branches

Why Choose Our Weldolet Branch Outlet

Professional forged fitting factory direct supply, stable stock & competitive factory ex-work price
All weldolets manufactured to full standard dimensions with zero minus tolerance, no thin-wall cost reduction
Regular common sizes in stock, fast delivery within 7-15 working days
Custom special main/branch size, wall thickness and surface treatment supported per customer drawings
Complete export certification set: Material Test Certificate (MTC), MPI NDT report, dimensional inspection sheet
Standard export wooden case packaging, prevent scratch, rust and deformation during long-distance ocean transportation

FAQ

Q1: What is Weldolet used for?

A: Weldolet is reinforced saddle branch fitting, welded on main pipe wall to open butt weld tapping branches, thickened saddle strengthens pipe wall to avoid stress cracking under high pressure, ideal for large-bore high-pressure process pipeline sampling and diversion.

Q2: What’s the difference between Weldolet and Sockolet?

A: Weldolet branch end is butt weld for large diameter branch pipelines; Sockolet features socket weld branch end for small-bore instrument control piping.

Q3: Do your weldolet have minus tolerance on wall thickness?

A: All our forged olet fittings are strictly produced to full nominal standard dimensions. We guarantee zero minus tolerance on outer diameter and wall thickness, never use thinner raw materials to cut production costs.

Q4: What pressure grades can this weldolet support?

A: We supply three standard pressure classes: Class3000, Class6000, Class9000, fully compliant with MSS SP-97 & ASME B16.11 high-pressure forged fitting standards.