Threadolet

QS Pipe Fitting: Zhangzhou Threadolet

Threadolet branch fitting with a threaded outlet to MSS SP 97, forged in ASTM A105 for screwed high-pressure branch connections.

Quantity

Contact Now

add to cart

One-Minute Overview

Threaded branch connection fitting welded onto the run pipe.
Built to MSS SP 97 in forged ASTM A105 carbon steel.
Threaded outlet lets the branch be removed for maintenance.
Sizes, threads and schedules are confirmed per inquiry.

A threadolet is a branch connection fitting that welds onto the run pipe and gives the branch a threaded outlet, so a small line can be screwed in rather than welded. This one follows MSS SP 97 and is forged from ASTM A105 carbon steel, a grade chosen for strength in high-pressure and high-temperature service. Because the outlet is threaded, the branch can be removed later for maintenance, which is why threadolets show up on vents, drains, gauges and instrument take-offs. The threaded end wants a compatible sealant and a clean taper rather than brute force. Sizes, thread forms, schedules and materials are confirmed per inquiry, and a detailed specification sheet is available on request.

Name: Threadolet
Type: Threaded branch connection fitting
Thread: Confirmed per inquiry
Material: ASTM A105 forged carbon steel, confirmed per inquiry
Size and Schedule: Confirmed per inquiry
Standard: MSS SP 97
Sizes, thread forms, schedules and materials are confirmed per inquiry, and a detailed specification sheet is available on request.

A threadolet is a branch connection fitting that welds onto the run pipe and gives the branch a threaded outlet, so a small line can be screwed in rather than welded. This one follows MSS SP 97 and is forged from ASTM A105 carbon steel, a grade chosen for strength in high-pressure and high-temperature service. Because the outlet is threaded, the branch can be removed later for maintenance, which is why threadolets show up on vents, drains, gauges and instrument take-offs. Specifying one means naming the run and branch sizes, the thread form, the schedule and the material group, then checking the pressure and temperature against the duty. The threaded end wants a compatible sealant and a clean taper, not brute force.

Installation has two halves: weld the fitting to the run, then screw in the branch. Cut and bevel the hole to the outline MSS SP 97 calls for, set the threadolet saddle on the run curvature, tack, check the branch orientation and weld with controlled heat input so the run pipe does not distort. Once the saddle weld has cooled and been inspected, chase the female thread, apply a sealant rated for the medium and tighten the branch without over-torquing, which can crack a small forged body. Keep the outlet capped until the instrument is fitted. Sizes, thread forms, schedules and materials are confirmed per inquiry, so ask for the specification sheet and the material certificate with the order.

FAQ

Q1. Why choose a threaded branch instead of a welded one?

Because it comes apart. A threaded outlet lets a gauge, vent or drain be removed and refitted during maintenance without cutting the line, and it suits small-bore branches where a full weld would be awkward. The trade-off is a thread that must be sealed properly and a rating that has to match the line, so state the thread form and the duty with the order.

Q2. Does MSS SP 97 fix the thread size as well?

It fixes the branch fitting design and the dimensions of the body, but the thread form and the schedule still have to be named on the order. Give the run size, the branch size, the thread standard and the pressure class, and the shop confirms the exact thread and schedule per inquiry rather than assuming a default.

Q3. Is ASTM A105 enough for a hot line?

It is a strong forged carbon steel and a common choice for high-pressure work, but temperature and medium still decide. State both with the inquiry so the grade and the schedule are checked against the real duty. A105 earns its place on strength; corrosion and high temperature may ask for a different material group.

Q4. What payment terms do you accept?

T/T, L/C at sight and other internationally accepted terms. The exact terms are agreed with you before production starts, because the payment schedule has to match the order value, the shipping method and the delivery schedule you need — which is also why we confirm them up front rather than after shipment.

Send Message