YY/T 0031-2008 English PDF (YYT0031-2008)

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YY/T 0031-2008: Silicone tubes and elastomeric parts for infusion and transfusion
YY/T 0031-2008
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 11.040.20
C 31
Replacing YY/T 0031-1990
Silicone tubes and elastomeric parts for infusion and
transfusion
ISSUED ON: OCTOBER 17, 2008
IMPLEMENTED ON: JANUARY 01, 2010
Issued by: China Food and Drug Administration
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Product classification ... 5 
4 Requirements ... 5 
5 Packaging, marks ... 8 
Annex A (normative) Steam resistance test ... 9 
Annex B (normative) Physical test ... 11 
Annex C (normative) Soluble substance test ... 12 
Silicone tubes and elastomeric parts for infusion and
transfusion
1 Scope
This Standard specifies the general requirements and test methods for silicone
tubes for infusion and transfusion (hereinafter referred to as “the tubes”) and
elastomeric parts.
The products to which this Standard is applicable include (but are not limited
to):
-- Reusable in vitro transfer lines for intravenous infusion;
-- Disposable silicone rubber elastic parts in blood treatment products, such
as pump tubing, valves or seals for flow control devices, injection parts;
-- Silicone rubber elastic parts for disposable infusion apparatus, such as
silicone rubber reservoirs for injection parts and infusion pumps;
-- Pump tubes, valves, and injection parts in disposable pressure infusion
lines.
This Standard does not include silicone rubber catheters and artificial heart-
lung machine pump tubes inserted or implanted in the human body.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Standard,
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 528, Rubber, vulcanized or thermoplastic - Determination of tensile
stress-strain properties (GB/T 528-1998, eqv ISO 37:1994)
GB/T 529, Rubber, vulcanized - Determination of tear strength (trouser, angle
and crescent test pieces) (GB/T 529-1999, eqv ISO 34-1:1994)
GB/T 3512, Rubber, vulcanized or thermoplastic - Accelerated ageing and
Annex A
(normative)
Steam resistance test
A.1 Principle
For silicone rubber products that are expected to undergo steam sterilization,
use a specimen that is obtained with same production process and is in
accordance with GB/T 528, after subjecting to the saturated steam at specified
temperature to the specified time, to determine the reduction rate of physical
properties before and after this process.
A.2 Test instruments
Pressure steam sterilizer (temperature control accuracy is within ±2°C).
A.3 Steps
A.3.1 Conduct the breaking strength test and the break elongation test to the
specimen according to the provisions of GB/T 528.
A.3.2 Use 100°C water to inject into the pressure steam sterilizer. Then hang
the unstretched specimen in the sterilizer to make the specimen spacing not
less than 5cm, the distance between the specimen and the wall not less than
10cm. Quickly heat to 121°C and remain the constant temperature for 2h. After
the specified time, when it is immediately cooled to 100°C, take out the
specimen. Hang at room temperature for 4h±0.5h. Then conduct the breaking
strength test and the break elongation test to the specimen according to the
provisions of GB/T 528.
A.4 Result expression
Calculate the percent reduction of the performance according to the following
formula:
Where,
η - The percent reduction of the performance;
A - The determined value of specimen performance after hot steam treatment;
Annex C
(normative)
Soluble substance test
C.1 Preparation of inspection solution
C.1.1 Pipeline
Take 8g of pipeline. Cut it into 10mm pieces. Use distilled water to wash at least
3 times. Place the specimen into a ground bottle. Add 100mL of distilled water
to make the specimen immersed in the distilled water. Then put it into the
pressure steam sterilizer at 121°C±2°C for 1h. Then take it out. Cool to room
temperature. Use the distilled water of same batch after the same treatment as
the blank control solution.
C.1.2 Elastomeric parts
C.1.2.1 When the expected use time of the elastomeric parts exceeds 24h, take
8g of pipeline. Cut into 10mm pieces. Use distilled water to wash 3 times. Place
the specimen into a ground bottle. Add 100mL of distilled water to make the
specimen immersed in the distilled water. Then soak it at 70°C±2°C for 24h and
take it out. Cool to room temperature. Use the distilled water of same batch
after the same treatment as the blank control solution.
C.1.2.2 When the expected use time of the elastomeric parts does not exceed
24h, take 8g of elastomeric parts. Cut into 10mm pieces. Use distilled water to
wash 3 times. Place the specimen in a ground bottle. Add 100mL of distilled
water to make the specimen immersed in the distilled water. Then soak it at
37°C±2°C for 24h and take it out. Cool to room temperature. Use the distilled
water of same batch after the same treatment as the blank control solution.
C.2 Color
Take inspection solution in a colorimetric tube. Visually observe if the solution
is colorless and transparent.
C.3 pH value
Take inspection solution and blank control solution. Use a PH meter to
respectively test pH values to confirm whether the difference between those
two complies with the provisions of Table 3.
C.4 Evaporation residues