Home > Compression fittings
Discover excellence in compression fittings by browsing our product pages. We present an extensive selection of premium solutions carefully adapted to varied plumbing and mechanical needs. Built with precision for dependability, our Compression fittings comply with strict industry standards, ensuring safe and leak-free connections across every use case. Through customizable choices, competitive rates, and fast shipping, our main priority is keeping customers satisfied. Enhance your projects with our reliable compression fittings, backed by a steadfast dedication to excellence.
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Imperial Size |
1/2″ to 2″ |
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Size |
1/16”OD to 2”OD, 2mm OD to 50mm OD |
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Thread |
NPT, BSP, BSPT, UNF, ISO, SAE, MS, AN, weld ends etc. |
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Pressure Rating |
6000PSI for Carbon Steel, 300/1000/3000PSI |
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Temperature Ratings |
Up to 1000°F (537°C) |
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Types |
Front & Back Ferrule, Nut, Fitting And Closer, Tube And Closer, Union, Reducing Union, Bulkhead Union, Union Elbow, Bulkhead Elbow, Union Tee, Reducing Union Tee, Union Cross, Male Connector, Male Connector – BSP, O Seal Male Connector, Bulkhead Male Connector, Male Elbow, 45 Deg. Male Elbow, Positionable Male Elbow, 45 Deg. Positionable Male Elbow, Male Run Tee, Male Branch Tee, Positionable Male Run Tee, Positionable Male Branch Tee, Female Connector, Female Manometer Connector, Bulkhead Female Connector, Female Elbow, Female Run Tee, Female Branch Tee, Butt Weld Pipe Connector, Bulkhead Reducer, Male Adaptor, O Seal Male Adaptor, Female Adaptor, Female Manometer Adaptor. |
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Application |
Power/ gas/ petroleum/ chemical/ metallurgy/ shipbuilding etc. |
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End Connection Thread Type |
NPT – ASME B1.20.1, SAE AS71051 | ISO/BSP Parallel – ISO 228 | ISO/BSP Tapered – ISO 7, BS EN 10226-1 | SAE (Unified) – ASME B1.1 |
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Carbon, Max % |
0.026 |
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Manganese, Max % |
0 |
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Phosphorus, Max % |
0.04 |
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Sulphur, Max % |
0.05 |
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Silicon, Max % |
0.4 |
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Copper, Max % |
0.20 |
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KEY PHYSICAL PROPERTIES |
CAST CARBON STEEL |
FORGED |
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0.30/0.35 C Max |
A216-WCB |
A105 |
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0.25 C Max |
A216-WCC |
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LOW TEMPERATURE STEEL |
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0.25/0.30 C Max |
A352-LCB |
A350-LF2 |
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0.5 Mo |
A352-LC1 |
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2.5 Ni |
A352-LC2 |
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3.5 Ni |
A352-LC3 |
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C-MN-Si (0.25 Max) |
A352-LCC |
A350-LF3 |
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C-MN-Si-V (1.15~1.50 Mn) |
A350-LF6 |
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At Koasteel, we take pride in being the largest supplier and manufacturer in the New Zealand, delivering advanced solutions for all your piping requirements. With cutting-edge production plants strategically situated in the New Zealand, we hold an extensive inventory of more than 25,000 tons of top-quality materials kept ready in stock.
Reach out to us for a fast quote tailored to your requirement.
These Compression fittings are supplied by us in accordance with DIN, ISO, JIS or ANSI Standard.
Simple to Fit: Setting up compression fittings is uncomplicated, needing only common tools and no soldering, welding, or specialist expertise, which puts them within reach of both tradespeople and DIY hobbyists.
Seals Without Leaks: With correct installation, compression fittings deliver a dependable, leak-free seal that safeguards the soundness of plumbing and gas systems.
Flexible Use: Compatible with many pipe materials such as copper, plastic, and steel, compression fittings serve a broad set of uses including plumbing, heating, and cooling systems.
Can Be Reused: Compression fittings come apart and go back together with ease and without harming the pipes, making adjustments and upkeep possible without having to swap out parts.
Long-Lasting: Crafted from sturdy materials such as brass or stainless steel, compression fittings provide outstanding protection against corrosion and wear, delivering durable performance even in demanding conditions.
Compression fittings are susceptible to corrosion, especially when subjected to severe environmental conditions or paired with incompatible metals within the plumbing system, which can cause galvanic corrosion. That said, fittings constructed from corrosion-resistant materials such as brass or stainless steel are less vulnerable to corrosion. Routine upkeep, such as examining and treating affected spots, can help reduce corrosion risks and prolong the fittings’ service life. Furthermore, applying protective coatings or anti-corrosion treatments at the time of installation can offer extra defense against corrosion.