Inoxmanways.com
Stainless steel manways

Stainless steel manways

(58)

From stock

Oval manway W3/F (440x308)

Oval manway

W3/F (440x308)

Oval manway E125XL (550x450)

Oval manway

E125XL (550x450)

Oval manway E126 (340x450)

Oval manway

E126 (340x450)

Oval manway E126/1 (440x340)

Oval manway

E126/1 (440x340)

Oval manway E126RS (440x340)

Oval manway

E126RS (440x340)

Oval manway E128RS (440x308)

Oval manway

E128RS (440x308)

Oval manway E127 (440x308)

Oval manway

E127 (440x308)

Oval manway E127/1 (444x312)

Oval manway

E127/1 (444x312)

Oval manway E128T (440x308)

Oval manway

E128T (440x308)

Oval manway E128TS (440x308)

Oval manway

E128TS (440x308)

Rectangular manway E129 (530x406)

Rectangular manway

E129 (530x406)

Rectangular manway E130 (424x316)

Rectangular manway

E130 (424x316)

Rectangular manway E131 (424x316)

Rectangular manway

E131 (424x316)

Oval manway E156 (540x410)

Oval manway

E156 (540x410)

Oval manway A304 (305x430)

Oval manway

A304 (305x430)

Oval manway A306 (305x430)

Oval manway

A306 (305x430)

Oval manway A307 (305x430)

Oval manway

A307 (305x430)

Oval manway A308 (345x445)

Oval manway

A308 (345x445)

Oval manway A309 (345x445)

Oval manway

A309 (345x445)

Oval manway A309IG (345x445)

Oval manway

A309IG (345x445)

Oval manway A310 (400x490)

Oval manway

A310 (400x490)

Oval manway A312 (305x430)

Oval manway

A312 (305x430)

Oval manway A314 (400x490)

Oval manway

A314 (400x490)

Oval manway A315 (400x490)

Oval manway

A315 (400x490)

Oval manway A316 (345x445)

Oval manway

A316 (345x445)

Oval manway A317 (345x445)

Oval manway

A317 (345x445)

Oval manway A317E (345x445)

Oval manway

A317E (345x445)

Oval manway A318 (345x445)

Oval manway

A318 (345x445)

Oval manway A319 (345x445)

Oval manway

A319 (345x445)

Oval manway A320 (345x445)

Oval manway

A320 (345x445)

Oval manway A321 (345x445)

Oval manway

A321 (345x445)

Rectangular manway A364 (530x400)

Rectangular manway

A364 (530x400)

Oval manway E125 (410x510)

Oval manway

E125 (410x510)

Oval manway E128 (440x308)

Oval manway

E128 (440x308)

Oval manway E128/1 (444x312)

Oval manway

E128/1 (444x312)

Rectangular manway A374 (420x310)

Rectangular manway

A374 (420x310)

Rectangular manway E129/1 (530x406)

Rectangular manway

E129/1 (530x406)

Special-purpose manway E130CEM (424x316)

Special-purpose manway

E130CEM (424x316)

Special-purpose manway E127CEM (438x306)

Special-purpose manway

E127CEM (438x306)

Oval manway P11-101 (307x442)

Oval manway

P11-101 (307x442)

Rectangular manway P13-105 (314x424)

Rectangular manway

P13-105 (314x424)

Rectangular manway P13-409 (410x534)

Rectangular manway

P13-409 (410x534)

Oval manway P11-102 (442x307)

Oval manway

P11-102 (442x307)

Oval manway P11-302 (442x307)

Oval manway

P11-302 (442x307)

Oval manway P11-129 (407x452 / 411x455)

Oval manway

P11-129 (407x452 / 411x455)

Oval manway P11-340-440ED (340x440)

Oval manway

P11-340-440ED (340x440)

Oval manway P11-410-510 (410x510)

Oval manway

P11-410-510 (410x510)

Oval manway P11-608 (600x800)

Oval manway

P11-608 (600x800)

Round manway P12-510 (DN504-DN800)

Round manway

P12-510 (DN504-DN800)

Oval manway P41-040 (305x440)

Oval manway

P41-040 (305x440)

Rectangular manway P43-012 (405x530 / 420x310)

Rectangular manway

P43-012 (405x530 / 420x310)

Oval manway C19 (440x310)

Oval manway

C19 (440x310)

Oval manway C49 (440x350)

Oval manway

C49 (440x350)

Oval manway C50 (440x350)

Oval manway

C50 (440x350)

Oval manway C52 (480x370)

Oval manway

C52 (480x370)

Round manway K-MC (DN600-DN800)

Round manway

K-MC (DN600-DN800)

Special-purpose manway E127BL (438x306)

Special-purpose manway

E127BL (438x306)

New product

Oval manway A324IG (550x650)

Oval manway

A324IG (550x650)

Stainless steel inspection manways – what are they used for?

Stainless steel manways are used as an inspection component of industrial tanks. They enable access to the interior of the chamber in which the manway is installed by opening and sliding off the lid.

Round stainless steel manway

Rectangular stainless steel manway

Stainless steel manways are used:

in liquid product tanks,
in silos for the storage of bulk raw materials,
in various industrial process equipment.

The most important feature of stainless steel manways is the material used for their production. For the most part, manways for tanks are manufactured from steel grades AISI 304/304L or AISI 316/316L. Among some models, mild steel versions are also available (for example S235JR), but these naturally lack the features typical of stainless versions.

Types of stainless steel manways

Stainless steel manways are a broad group of products that are divided according to particular features and parameters. Thus, a distinction can be made in terms of:

shape (round manways, oval manways, rectangular manways),
mounting method (top manways or side manways),
operating pressure (non-pressure manways or pressure manways),
installation substrate (manways for wooden, cement/concrete or plastic tanks).

In addition, important parameters in the selection of steel manways are also:

dimensions (diameter or length of manway sides),
frame height and wall thickness,
construction material (AISI 304/304L or AISI 316/316L, optionally mild steel),
locking system (handwheels, clamp or gate).

Shapes of stainless steel manways

There are three groups of manways as divided by shape: round, oval and rectangular (including square).

Round manways are most often used as stainless steel tank lids mounted on top of tanks. They are used in various manufacturing processes where they serve a function:

process opening (for example, to add ingredients to a mixer by a production line operator),
maintenance opening (manway provides access for technicians to the inside of the chamber in case of emergency),
sealing lid (to prevent unwanted release of liquid from the tank),
inspection, control – they allow for permanent process control without opening the lid (manways with glass lid, manways with sight glass in the lid) or reading of measurement devices (inspection and measurement chambers).

Round manways are available in both non-pressure and pressure versions. The round manway range is also the most numerous and most popular category of manways.

Rectangular manways are a group of products with a very diverse range of dimensions and a wide range of applications. Among the rectangular manways there are models with side lengths ranging from 200 mm to 2000 mm. Rectangular manways are usually installed in the side wall of a non-pressure tank or one with relatively low operating pressure. On the other hand, some rectangular manways are used only as lids intended for installation in the upper part of tanks.

An important feature of rectangular manways is their typically low pressure resistance (generally not exceeding the range of 0.5-2.5 bar). Thus, rectangular manways mainly serve the inspection/inspection function of low operating pressure tanks.

Oval manways are a group of products that are almost always installed in the side walls of tanks. In addition, they mostly provide the ability to open the manway towards the inside of the tank. This means that this type of design is ideal for pressure tanks, where the forces inside will push against the manway.

Mounting methods for stainless steel manways

The installation of stainless steel manways is usually carried out in the roof or in the side shell of the tank. Depending on the preferred mounting location, manways vary in their performance.

Manways for top installation are often non-pressure models (stainless steel lids). Their main task is to protect the inspection opening of the tank and the medium inside from external factors (for example, rainwater if the tank is located outside). Among the top manways, however, there are also pressure manways (equipped with more handwheels), used in various types of reactors and pressure tanks.

Side manways, on the other hand, are designed to maintain a tight seal against liquid pressure in the tank. Among side manways, oval and rectangular manways are the dominant shapes.

Pressure resistance of stainless steel manways

Stainless steel manways are divided into non-pressure and pressure manways, depending on their pressure resistance parameter.

Non-pressure stainless steel manways (also often called stainless steel lids) are designed for installation in tanks and equipment without pressurised medium inside. Their role is to protect the inspection opening of the manway and the medium in the tank from external factors. Non-pressure manways include models with pressure resistance not exceeding 0.5 bar.

Pressure manways (in addition to the function of protecting the inspection opening) offer additional sealing under pressure conditions. They are therefore suitable as equipment for units and tanks in which the medium is stored at pressures higher than 0.5 bar. Pressure manways are used, for instance, in the production of beer (CCT or BBT tanks), sparkling wine, and specialised pressure reactors. PED certification is available for specialised pressure models to confirm the pressure resistance and material quality of the manway.

Stainless steel manways installation base

Stainless steel manways are typically designed to be welded into a stainless steel base. This is provided by a manway mounting frame of a specific size and thickness, which is a structural part that is directly welded to the stainless tank shell.

However, there are versions of stainless steel manways suitable for installation in bases other than stainless steel – these include:

manways for wooden tanks (barrels),
manways for concrete/cement tanks,
manways for plastic tanks (polyethylene, polypropylene),
manways for mild steel tanks.

Applications of INOX manways

Stainless steel manways are very frequently used in food and beverage production plants. Commonly seen:

in breweries and distilleries,
in milk and dairy plants,
in wineries,
in fruit and vegetable processing plants.

Another area where stainless steel manways serve their purpose perfectly are tanks and reactors in the chemical, cosmetic and biotechnological industries. They are also used wherever high hygienic requirements or corrosion resistance are critical to the production process and the safety of the end product.

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