Flask Manufacturer Manufacturer, Suppliers and Exporter in Ambala India

Laboratory Glassware Ambala is leading Flask Manufacturer Manufacturer,and supplier and Exporter in Amabla India, Algeria (Algiers), Angola (Luanda), Argentina (Buenos Aires), Armenia (Yerevan), Australia(Canberra), Austria (Vienna), Bahrain (Manama), Bangladesh (Dhaka), Bhutan (Thimphu), Bolivia (Sucre), Botswana (Gaborone), Brazil (Brasília), Brunei (Bandar Seri Begawan), Montenegro (Podgorica), Morocco (Rabat), Mozambique (Maputo), Myanmar (Naypyidaw), Namibia (Windhoek), Nepal (Kathmandu), New Zealand (Wellington), Nigeria (Abuja), Oman (Muscat), Palestine (Ramallah), Panama (Panama City), Papua New Guinea (Port Moresby), Paraguay (Asunción), Peru (Lima), Philippines (Manila)¸ Portugal (Lisbon), Qatar (Doha), Rwanda (Kigali), Saudi Arabia (Riyadh), Senegal (Dakar), Serbia (Belgrade), Sierra Leone (Freetown), Slovakia (Bratislava), South Africa (Cape Town) (Pretoria) (Bloemfontein), South Sudan (Juba), Spain (Madrid), Sri Lanka (Sri Jayawardenepura Kotte) (Colombo), Sudan (Khartoum), Syria (Damascus), Tanzania (Dodoma), Thailand (Bangkok), Togo (Lomé), Tonga (Nuku'alofa), Trinidad and Tobago (Port of Spain), Tunisia (Tunis), Turkey (Ankara), Turkmenistan (Ashgabat), Uganda (Kampala), United Arab Emirates (Abu Dhabi), United Kingdom (London), United States (Washington, D.C.)

Laboratory Glassware Ambala is a producer and exporter of laboratory glassware located at Ambala Cantt, Haryana, India. We supply our products to schools, colleges, universities, technical institutes, research and industrial laboratories, hospitals and government institutions in Asia, the Middle East and Africa. This page gives details of the three specifications that determine what the actual volumetric flask will deliver: class of accuracy, whether the flask will have serial number and the calibration certificate accompanying the flask. They determine the suitability of a flask to be used in a controlled procedure and in an accredited laboratory. They are often forgotten to be included in a purchase order. The flasks are found in the volumetric flask list and the glass flask list.

What Class A and Class B actually mean

Accuracy class is a tolerance grade, not a quality grade. The ASTM specification for laboratory glass volumetric flasks, ASTM E288, defines the two grades in current use:

Class A	Class B
Grade	Precision	General purpose
Basic design	—	The same basic design as Class A
Volumetric tolerance	The tolerance stated in the specification's tables	Within twice the range allowed for Class A
Class marking	Each flask must be marked with the letter "A"	Need not be marked with its class designation
Serial number	May be marked with an identification number, at the manufacturer's option	—

Two consequences follow. First, because a Class B flask need not carry any class marking, a flask arriving with no letter on it is not evidence of anything — it may be Class B, or it may be an unmarked Class A. The order and the packing documentation are what establish which was supplied. Second, because Class B tolerance is defined as twice Class A, the two are not interchangeable in a method that specifies a tolerance: doubling the permitted volumetric error changes the result, not just the paperwork.

The same specification notes that micro volumetric flasks from 1 mL to 25 mL are covered by a separate ASTM specification, so an enquiry for small-capacity precision flasks should say which basis is required.

What "serialized" and "unserialized" mean on a flask order

A serialized flask carries an individual identification number marked on the glass; an unserialized flask does not. Under ASTM E288 that number is optional even for Class A, which is why both versions exist in the same class.

The number matters when a certificate does. An individual calibration or works certificate refers to one specific flask, and the serial number is what ties the certificate to the item on the bench. Without it, a certificate can only describe a batch — which is usually acceptable for teaching work and usually not acceptable in an accredited laboratory, a validated pharmaceutical method or an audited quality system. Decide which you need before ordering, because a flask cannot be serialized after the fact.

State it explicitly on the enquiry: Class A, serialized, with individual certificate is a different product and a different price from Class A, unserialized, even when both are listed under similar names.

What to state on a volumetric flask enquiry

• Capacity and quantity for each capacity — a mixed order is several production runs, not one.
• Class A or Class B, and the tolerance basis if a specific specification is required by your method or tender.
• Serialized or unserialized, and whether an individual certificate is required with each flask.
• Closure — the listings distinguish penny-head, hollow glass, polyethylene, PE, PTFE and snap-cap closures. Closure material decides chemical compatibility and whether the flask can be stoppered for storage.
• Clear or amber — amber construction is for light-sensitive solutions; specify it where the method requires protection from light.
• Material — the volumetric range includes a polypropylene flask alongside the glass ones. A glass volumetric specification does not apply to a plastic flask, so if a specification is being quoted, confirm the material it is being applied to.
• Neck size where an accessory has to fit — the bumper guard listed in this range is specified by neck size against capacity band, and accessories only fit the neck they are made for.

Where flasks are listed on this website

• Laboratory Flasks — the flask category overview covering both ranges
• Volumetric Flasks — 17 listings including Class A and Class B, amber and clear, serialized and unserialized, several closure types, a polypropylene flask and a bumper guard
• Glass Flask — Erlenmeyer, conical, round-bottom, pear-shaped, multi-neck, filtering, Buchner, Kjeldahl, culture, distillation, evaporating and dissolution flasks
• Glass pipettes andburettes — the other volumetric glassware where accuracy class applies

Institutional and export enquiries

Laboratory Glassware Ambala supplies laboratory glassware to schools, colleges, universities, technical institutes, research laboratories, healthcare institutions, industrial laboratories and government organisations, and exports to countries across Asia, the Middle East and Africa. Tender and OEM enquiries can be sent through theTenders and OEM page.

Where a bill of quantities specifies an accuracy class, quote the class and the serialization requirement against each line so that the response can be matched item by item.

Frequently asked questions

Can Class B flasks be substituted for Class A on a tender line?

Not without the buyer's agreement. Class B tolerance is defined as twice the Class A range for the same nominal capacity, so a substitution changes the permitted volumetric error. If a tender line says Class A, treat it as a specification rather than a preference.

Does a Class A flask always carry a certificate?

No. Class A describes the tolerance grade and requires the letter "A" to be marked; it does not by itself mean an individual certificate is supplied. Ask for the certificate separately, and ask whether it is a batch document or an individual one tied to a serial number.

Which flasks on this website should be used for accurate volume measurement?

Volumetric flasks, pipettes and burettes — the glassware made and marked to a tolerance. Conical, round-bottom, filtering and culture flasks in the glass flask range are containment and process vessels, and any graduations they carry are approximate.

Request a quotation

Send your capacities, quantities, accuracy class, serialization and certificate requirements through thecontact page, or use theTenders and OEM page for tender and project enquiries.