{"id":706,"date":"2026-07-31T01:15:33","date_gmt":"2026-07-31T01:15:33","guid":{"rendered":"https:\/\/zhhmarinefender.com\/?p=706"},"modified":"2026-07-31T07:05:38","modified_gmt":"2026-07-31T07:05:38","slug":"different-types-of-pneumatic-fenders","status":"publish","type":"post","link":"https:\/\/zhhmarinefender.com\/es\/different-types-of-pneumatic-fenders\/","title":{"rendered":"Diferentes tipos de defensas neum\u00e1ticas"},"content":{"rendered":"

Types of pneumatic fenders are defined across two parts of ISO 17357. Part 1 covers three high-pressure types: Type I net-type, Type I Single, and Type II sling-type. Part 2 covers two low-pressure types, clamped end and moulded end. The type describes end construction and whether a protection net is fitted. Rated initial internal pressure is a separate order parameter: 50 kPa or 80 kPa under Part 1, and 7 kPa unless otherwise specified under Part 2. Chain-tyre nets, aircraft-tyre nets and non-marking grey compounds are supplier options layered on those five types.<\/p>\n

Specification snapshot<\/strong><\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n
Specification point<\/th>\nWhat ISO 17357 states<\/th>\n<\/tr>\n<\/thead>\n
Part 1 high-pressure types<\/td>\nType I (net), Type I Single (net, one end with no flange opening and no metal parts), Type II (sling)<\/td>\n<\/tr>\n
Part 2 low-pressure types<\/td>\nClamped end type, up to and including 2.3 m diameter; moulded end type, 2.8 m diameter and above<\/td>\n<\/tr>\n
Rated initial internal pressure<\/td>\n50 kPa or 80 kPa (Part 1); 7 kPa unless otherwise specified (Part 2)<\/td>\n<\/tr>\n
GEA measurement basis<\/td>\nGuaranteed energy absorption stated at 60 \u00b1 5 % deflection (both parts)<\/td>\n<\/tr>\n
Reaction force tolerance<\/td>\n\u00b1 10 % at GEA deflection (both parts)<\/td>\n<\/tr>\n
Safety valve<\/td>\nRequired at 2,500 mm diameter and above (Part 1); optional below that, if stated on the order<\/td>\n<\/tr>\n
Prototype test validity<\/td>\nPerformance confirmation every ten years, evaluated by a major classification society<\/td>\n<\/tr>\n
Current status<\/td>\nBoth parts published January 2014, last reviewed and confirmed in 2024<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\"Zhonghaihang<\/p>\n

What ISO 17357 Counts as a Pneumatic Fender, and What It Does Not<\/h2>\n

A pneumatic fender under ISO 17357-1:2014<\/a> is a synthetic-cord-reinforced rubber body holding compressed air at a rated initial pressure of 50 kPa or 80 kPa. That definition excludes two products that sit beside it in most supplier catalogues.<\/p>\n

A Yokohama fender<\/a> or pneumatic fender is a strong, durable rubber fender that is filled with high-pressure air. It deflates easily, so it can be moved and reinstalled elsewhere with ease. Foam-filled fenders<\/a> share that mobility. Their energy comes from a closed-cell foam core inside a polyurethane skin, with no internal pressure to set, monitor or top up.<\/p>\n

You should distinguish between pneumatic fenders and marine airbags<\/a>. Marine airbags are generally used for launching ships, while pneumatic fenders absorb berthing and mooring energy between two hulls or between a hull and a structure. We check the product category against the berthing duty stated on the enquiry before quoting, because a foam fender and a pneumatic fender answer different questions.<\/p>\n

Pneumatic fenders are manufactured in several different ways, each with its advantages. The most common methods are moulding and wrapping. ISO 17357 does not classify fenders by production method, and neither method establishes compliance on its own. Compliance comes from the construction requirements, prototype testing and commercial inspection documentation for the specific design and pressure rating.<\/p>\n

Pneumatic fenders come in a wide range of sizes, and can also be custom-made to suit a particular berth. Catalogue ranges differ between manufacturers. Take both diameter and length from the supplier’s certified performance table.<\/p>\n

Order a fender by trade name and colour alone, with no ISO part, type or rated pressure on the purchase order, and a sling-type unit can arrive at a berth specified for a net-type. That correction is a re-order.<\/p>\n

Applications for pneumatic fenders<\/strong><\/p>\n