What is a threaded steel pipe?
A threaded pipe, also known as a pre-cut pipe or ready-cut pipe, is a type of pipe that is prepared with threaded ends for easy connection. A threaded steel pipe is a finished pipe product with threads machined at one or both ends.
Characteristics of threaded steel pipes
1. Threads on both ends or one end
Common thread standards include:
NPT (American standard)
BSPT (British Standard)
2. The Advantage of Pre-cut Pipe
No welding required
Direct connection to threaded fittings like elbows, tees, couplings, pipe clamps, valves, etc.
Ideal for rapid installation and maintenance.
3. Common Materials
Carbon Steel: Black Steel (black surface finish), Hot-dip galvanized
Stainless Steel Threaded Pipe: 304, 304L, 316, and 316L
4. Primary Applications
Threaded steel pipes are commonly used in:
Civil & Engineering Water Supply
LPG / Natural Gas
Sprinklers
HVAC Systems, Compressed Air
Industrial Piping, Mechanical Equipment
Low- and Medium-Pressure Networks
Threaded Steel Pipe vs Plain-End Steel Pipe: Key Differences
1. Appearance
Threaded Steel Pipe:
Pipe is machined into threaded ends
Can be directly connected to a threaded fitting
Plain-End Steel Pipe:
Pipe ends feature plain ends or beveled ends
Cannot be directly connected to threaded fittings
2. Different Manufacturing Processes
Threaded Steel Pipe:
Requires an additional cut threading process
Threads are machined on a lathe/threading machine
Higher manufacturing precision requirements (taper, depth, accuracy)
Plain End Steel Pipe:
No end processing required
Directly used for welding, flange connections, etc.
3. Usage Method Differences
Threaded Pipe: Can be directly screwed into place without welding required, screw on threaded components like elbows, tees, pipe clamps, valves, etc.
Plain End Steel Pipe: Requires welding or flange connections
4. Cost
Threaded Steel Pipe is a little more expensive than plain-end pipe due to an additional manufacturing step.
Plain End Pipe has a lower raw material cost, resulting in a lower price.
Technical Specifications
| Specification | Details |
|---|---|
| Size Range | 1/2" – 6" (DN15 – DN150) |
| Wall Thickness | SCH10 / SCH40 / SCH80 |
| Standards | ASTM A53 / A106 / A135 / EN10255 / JIS |
| Thread Types | NPT / BSPT / BSPP |
| End Types | Threaded End |
| Surface Options | Black / Hot-dip galvanized |
| Material | Carbon Steel, Stainless Steel (304 / 316) |
Packaging & Delivery
Pipes bundled with steel straps
Protective plastic caps on both ends
Thread protectors to avoid damage during transit
Loaded on pallets for safe handling
Customized marking and labeling available
Compliance & Certifications
ISO 9001 certified manufacturing process
UL/FM approval available for fire protection applications
CE marking for European compliance
Mill Test Certificates (MTC / EN10204 3.1)
FAQs
Q1: What is the difference between NPT and BSPT threads?
A: NPT is the American standard tapered thread, while BSPT is the British standard tapered thread. Both provide tight seals but differ in angle and thread pitch.
Q2: Can threaded pipes be used in high-pressure systems?
A: Threaded steel pipes are suitable for medium-pressure systems. For very high-pressure applications, welded or flanged pipes are recommended.
Q3: Do you offer customized lengths?
A: Yes, we can cut pipes to customer-specified lengths.
Ordering Information
MOQ: Negotiable, both small trial orders and bulk orders are welcome.
Lead Time: 15–30 days, depending on quantity
Available Lengths: 18 to 72 inches, or customized
Custom Thread Options: NPT, BSPT, BSPP
