When it comes to piping systems—especially those involving water, gas, or fire protection—pressure rating is a critical specification. It tells you how much pressure a fitting can safely handle without failure.
Threaded fittings are commonly used in both low and high-pressure systems across residential, commercial, and industrial applications. Choosing the correct pressure rating ensures the reliability and safety of the entire system.
At JIANZHI, we manufacture a wide range of heavy-duty plumbing fittings designed to meet demanding pressure requirements—backed by rigorous quality control and FM/UL certifications.
The pressure rating of a threaded fitting refers to the maximum internal pressure it can handle at a specific temperature. It is often indicated as:
● Working Pressure (WP): Safe pressure during normal operation
● Burst Pressure: Maximum pressure before failure
● Test Pressure: Pressure applied during quality testing
Pressure is typically measured in PSI (pounds per square inch) or bar.
| Fitting Type | Material | Pressure Rating (PSI) | Notes |
|---|---|---|---|
| Elbows / Tees / Couplings | Malleable Iron | 150 - 300 | For general plumbing systems |
| Heavy-duty Unions | Malleable Iron | 300 - 600 | Fire protection / industrial |
| Stainless Steel Fittings | Stainless Steel | Up to 1000 | High-pressure applications |
In many Latin American countries, such as Mexico, Brazil, and Peru, plumbing projects must comply with strict safety standards. Installing fittings with inadequate pressure ratings can lead to:
● Leaks or system failures
● Project delays or fines
● Damage to property and equipment
That’s why project managers and engineers prefer JIANZHI threaded fittings—we provide reliable data and certified performance.
The term heavy-duty plumbing fittings refers to fittings built to withstand higher loads, pressures, and frequent use.
☑ Thicker walls for enhanced strength
☑ Precision threads for tight, leak-free connections
☑ High-grade malleable iron that resists cracking and deformation
☑ FM/UL certifications for safety-critical installations
☑ Low failure rate after 10,000+ pressure cycles (lab-tested)
Whether you are supplying fittings for high-rise buildings, fire protection systems, or industrial lines, heavy-duty threaded fittings are the safe choice.
In many cases, yes—heavier fittings often indicate more material and higher durability. But weight alone isn't the only indicator. You should also evaluate:
✅ Wall thickness
✅ Material composition
✅ Casting quality
✅ Manufacturing process control
JIANZHI fittings are engineered to provide optimal strength-to-weight ratios, combining reliability and ease of installation.
We take pressure testing seriously. Every batch of JIANZHI fittings goes through:
● Hydrostatic pressure tests
● Burst tests
● Thread precision inspection
● Material hardness and ductility checks
Our manufacturing facilities meet ISO 9001 standards, and many of our products carry FM and UL certification, required by large-scale infrastructure and fire protection projects across Latin America.
Distributors and project contractors in regions such as Bolivia, Colombia, Ecuador, and Chile rely on JIANZHI for:
☑ Certified heavy-duty fittings
☑ Clear documentation of pressure specs
☑ Competitive lead times
☑ Custom labeling and export support
Need help choosing the right pressure-rated fitting for your market? We’re here to support you.
If you’re planning a large plumbing or fire protection project and need pressure-tested fittings, don’t leave it to chance.
Let’s Power Your Next Project with Certified Strength
Whether you're sourcing for distribution or managing a large-scale plumbing or fire protection project, JIANZHI has the heavy-duty threaded fittings you can rely on—certified, pressure-tested, and ready for your market.
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E-mail: sales1@jianzhi-fitting.com
Tel: +86 18698027872
Office In Tianjin:
Heping District, Tianjin, China.
Production Base 1:
Chifeng, Inner Mongolia, China.
Production Base 2:
Tangshan City, Hebei Province, China.
Production Base 3:
Schelei Street,Baicoi City,Prahova County,Romania
Service email: info.ro@jianzhi-fitting.com
Sales email: market.ro@jianzhi-fitting.com
Tel: +40（755）011 849
