General Guidelines

A. Decide if the Clothing –Quần áo bảo hộ lao động Item is Intended to Provide Vapor, Liquid-Splash, or Particulate Protection

1. Vapor protective clothes – quan ao bao ho lao dong also provide liquid splash and particulate protection. Liquid splash protective clothes – Quần áo bảo hộ lao động also provide particulate protection. Many clothes may be labeled as totally encapsulating but do not provide gas-tight integrity due to inadequate seams or closures. Gas-tight integrity can only be determined by performing a pressure or inflation test and a leak detection test of the respective protective uniforms – bảo hộ lao động. This test involves:

  • Closing off clothes exhalation valves;
  • Observing whether the safety workwear holds the above pressure for a designated period.

ASTM Standard Practice F1052 (1987 Edition) offers a procedure for conducting this test.

2. Splash safety clothes – bảo hộ lao động must still cover the entire body when combined with the respirator, gloves, and boots. Applying duct tape to a splash safety clothes does not make it protect against vapors. Particulate protective uniforms – quan ao bao ho lao dong may not need to cover the entire body, depending on the hazards posed by the particulate. In general, gloves- găng tay, boots and some form of face protection are required. Clothing – bao ho lao dong  items may only be needed to cover a limited area of the body such as gloves on hands. The nature of the hazards and the expected exposure will determine if clothes should provide partial or full body protection.

B. Determine If the protective clothes –Quần áo bảo hộ lao động  Item Provides Full Body Protection

1. Vapor-protective or totally encapsulating safety clothes –bảo hộ lao động will meet this requirement by passing gas-tight integrity tests.

2. Liquid splash-protective uniforms are generally sold incomplete (i.e. fewer gloves and boots).

3. Missing clothing – quan ao bao ho lao dong items must be obtained separately and match or exceed the performance of the garment.

4. Buying a PVC glove for a PVC splash safety clothing – quan ao bao ho lao dong does not mean that you obtain the same level of protection. This determination must be made by comparing chemical resistance data.

C. Evaluate Manufacturer Chemical Resistance Data Provided With the clothes

1. Manufacturers of vapor-protective suits – bao ho lao dong should provide pervasion resistance data for their products, while liquid and particulate perforation resistance data should accompany liquid splash and particulate protective clothes respectively. Ideally data should be provided for every primary material in the suit or clothing item. For safety clothing, this includes the clothes, gloves –găng tay, boots, and seams.

2. Pervasion data should include the following:

  • Chemical name;
  • Breakthrough time (shows how soon the chemical permeates);
  • Pervasion rate (shows the rate that the chemical comes through);
  • System sensitivity (allows comparison of test results from different laboratories); and
  • A citation that the data was obtained in accordance with ASTM Standard Test Method F739-85.

3. If no data are provided or if the data lack any one of the above items, the manufacturer should be asked to supply the missing data. Manufacturers that provide only numerical or qualitative ratings must support their recommendations with complete test data.

4. Liquid perforation data should include a pass or fail determination for each chemical listed, and a citation that testing was conducted in accordance with ASTM Standard Test Method F903-86. Protective uniforms which are certified to NFPA 1991 or NFPA 1992 will meet all of the above requirements.

5. Particulate perforation data should show some measure of material efficiency in preventing particulate perforation in terms of particulate type or size and percentage held out. Unfortunately, no standard tests are available in this area and end users may have little basis for company products.

6. Clothing materials which show no breakthrough or no peforation to a large number of chemicals are likely to have a broad range of chemical resistance. (Breakthrough times greater than one hour are usually considered to be an indication of acceptable performance.) Manufacturers should provide data on the ASTM Standard Guide F1001-86 chemicals. These 15 liquid and 6 gaseous chemicals listed in Table VIII:1-4 below represent a cross-section of different chemical classes and challenges for protective clothing materials. Manufacturers should also provide test data on other chemicals as well. If there are specific chemicals within your operating area that have not been tested, ask the manufacturer for test data on these chemicals.

TABLE VIII:1-4. RECOMMENDED CHEMICALS TO EVALUATE THE PERFORMANCE OF PROTECTIVE CLOTHING MATERIALS
Chemical Class
·         Acetone

·         Acetonitrile

·         Ammonia

·         1,3-Butadiene

·         Carbon Disulfide

·         Chlorine

·         Dichloromethane

·         Diethylamine

·         Dimethyl formamide

·         Ethyl Acetate

·         Ethyl Oxide

·         Hexane

·         Hydrogen Chloride

·         Methanol

·         Methyl Chloride

·         Nitrobenzene

·         Sodium Hydroxide

·         Sulfuric Acid

·         Tetrachloroethylene

·         Tetrahydrofuran

·         Toluene

·         Ketone

·         Nitrile

·         Strong base (gas)

·         Olefin (gas)

·         Sulfur-containing organic

·         Inorganic gas

·         Chlorinated hydrocarbon

·         Amine

·         Amide

·         Ester

·         Oxygen heterocyclic gas

·         Aliphatic hydrocarbon

·         Acid gas

·         Alcohol

·         Chlorinated hydrocarbon (gas)

·         Nitrogen-containing organic

·         Inorganic base

·         Inorganic acid

·         Chlorinated hydrocarbon

·         Oxygen heterocyclic

·         Aromatic hydrocarbon

BẢNG VIII:1-4. NHỮNG HÓA CHẤT ĐƯỢC ĐỀ NGHỊ ĐỂ ĐÁNH GIÁ HIỆU QUẢ CỦA CÁC CHẤT LIỆU QUẦN ÁO BẢO HỘ LAO ĐỘNG
Hóa Chất Phân Loại
·         Acetone

·         Acetonitrile

·         Ammonia

·         1,3-Butadiene

·         Carbon Disulfide

·         Chlorine

·         Dichloromethane

·         Diethylamine

·         Dimethyl formamide

·         Ethyl Acetate

·         Ethyl Oxide

·         Hexane

·         Hydrogen Chloride

·         Methanol

·         Methyl Chloride

·         Nitrobenzene

·         Sodium Hydroxide

·         Sulfuric Acid

·         Tetrachloroethylene

·         Tetrahydrofuran

·         Toluene

·         Ketone

·         Nitrile

·         Strong base (gas)

·         Olefin (gas)

·         Sulfur-containing organic

·         Inorganic gas

·         Chlorinated hydrocarbon

·         Amine

·         Amide

·         Ester

·         Oxygen heterocyclic gas

·         Aliphatic hydrocarbon

·         Acid gas

·         Alcohol

·         Chlorinated hydrocarbon (gas)

·         Nitrogen-containing organic

·         Inorganic base

·         Inorganic acid

·         Chlorinated hydrocarbon

·         Oxygen heterocyclic

·         Aromatic hydrocarbon

D. Obtain and Examine the Manufacturer’s Technique Instruction

  1. This manual should document all the features of the clothing and describe what material(s) are used in its construction. It should cite specific limitations for the clothes and what restrictions apply to its use. Procedures and recommendations should be supplied for at least the following:
  • Donning and taking off
  • Examination, maintenance, and storage;
  • Decontamination
  • Use.

E. Obtain and check Sample Clothing Item

Examine the quality of clothing construction and other features that will impact its wearing. The questions listed under “Protective Clothes – bảo hộ lao động Selection Factors, Clothing Design” should be considered. If possible, representative clothing items should be obtained in advance and inspected prior to purchase, and discussed with someone who has experience in their use. It is also helpful to try out representative clothes – bao ho lao dong prior to purchase by suiting personnel in the clothes and having them run through exercises to simulate expected activities.

F. Field Selection of Chemical Safety clothes

  1. Even when end users have gone through a very careful selection process, a number of situations will arise when no information is available to judge whether their safety uniforms will provide adequate protection. These situations include:
  • Chemicals that have not been tested with the clothing materials;
  • Mixtures of two or more different chemicals;
  • Chemicals that cannot be readily identified;
  • Extreme environmental conditions (hot temperatures)
  • Lack of data in all clothing components (e.g. seams )
  1. Testing material specimens using newly developed field test kits may offer one means for making an on-site clothing selection. A portable test kit has been developed by the EPA using a simple weight loss method that allows field qualification of protective clothing materials within one hour. Use of this kit may overcome the absence of data and provide additional criteria for clothing selection.
  1. Selecting of chemical safety uniform is a complex task and should be performed by personnel with both extensive training and experience.

Under all conditions, clothing should be selected by evaluating its performance characteristics against the requirements and limitations imposed by the application.

Nam Nhan Phat Co., LTD  is the  trusted supplier to provide safety items bảo hộ lao động, sewing safety clothes may quân áo bảo hộ lao động, sewing safety uniforms- may đồng phục bảo hộ lao động, uniforms-may dong phuc, tools, clean room clothes.

To contact with us for supporting. (View more)

Nam Nhan Phat Co.LTD

Tel: 08 2253 1169

Hotline: 0938073502

Gmail: namnhanphat@gmail.com

Related articles:

Why do we need to equip the safety clothes

Vì sao cần trang bị quần áo bảo hộ lao động

Bảo hộ lao động những vấn đề cần xem xét

Đồng phục bảo hộ trong môi trường hóa chất (Phần I)

Đồng phục bảo hộ lao động trong môi trường hóa chất (Phần II)

Đồng phục bảo hộ lao động trong môi trường hóa chất phần III

Safety clothes in chemical environment (Part IV)

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