ASTM C950 - C 950M - 08 (2023)

VIP免费

Carl 2024-09-02 12 195.66KB 2 页 16星币

Designation: C950/C950M −08 (Reapproved 2023)
Standard Practice for
Repair of a Rigid Cellular Polyurethane Insulation System
on Outdoor Service Vessels
1
This standard is issued under the ﬁxed designation C950/C950M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers the repair of spray-applied polyure-
thane insulation on vessels normally operating at temperatures
between −30 and +107°C [−22 and +225°F].
1.2 Warning—At temperatures below 0°C [32°F] the ap-
plication of a spray “foam” directly onto the cold substrate may
not be possible. The term “foam” applies to spray-applied
polyurethane or polyisocyanurate (PUR or PIR) rigid cellular
plastic only, and not to any other plastic insulation.
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
with the standard.
1.4 This standard may involve hazardous materials,
operations, and equipment. This standard does not purport to
address all of the safety concerns, if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety, health, and environmental prac-
tices and determine the applicability of regulatory limitations
prior to use. For a speciﬁc precautionary statement see 1.2.
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
2
C168 Terminology Relating to Thermal Insulation
C945 Practice for Design Considerations and Spray Appli-
cation of a Rigid Cellular Polyurethane Insulation System
on Outdoor Service Vessels
3. Terminology
3.1 General—Deﬁnitions included in Terminology C168
shall apply to the terms used in this practice.
4. Surface Preparation
4.1 All damaged or nonadhering foam shall be removed to
the substrate in all directions, until dry, solidly adhering foam
is encountered.
4.2 The remaining foam insulation shall be beveled on all
sides to approximately a 45° angle.
4.3 The substrate shall be examined and if the existing
primer is damaged, it shall be wire-brushed and reprimed,
where feasible, in accordance with the primer manufacturer’s
instructions.
4.4 A covering shall be installed around the area to be
repaired, prior to spray foam application, to protect the
surrounding undamaged area from overspray and removed
after completion of the repair work.
5. Repair Procedure
5.1 The repair shall be accomplished in one of the following
manners:
5.1.1 Foam shall be spray applied to the prepared area and
top-coated with the speciﬁed protective coating. (An open-
weave reinforcing fabric may be embedded into the wet ﬁrst
coat if desired. Caution shall be taken to embed the reinforcing
fabric totally within the coating.)
5.1.2 For substrate temperatures below 0°C [32°F], the
following procedure shall be used: Cut to shape and install a
thin layer of rigid PUR/PIR board (to insulate the surface) in
the prepared area with a joint sealer. Apply spray foam in
accordance with 5.1.1.
5.2 All horizontal areas shall be repaired in a manner to
provide drainage and prevent free-standing water.
5.3 Spraying shall not be done in the presence of water
(rain, fog, condensation, etc.) or wind velocities greater than 15
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
Insulation and is the direct responsibility of Subcommittee C16.40 on Insulation
Systems.
Current edition approved March 1, 2023. Published March 2023. Originally
approved in 1981. Last previous edition approved in 2017 as C950 – 08 (2017).
DOI: 10.1520/C0950_C0950M-08R23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1

mph [24 km/h]. (With the owner’s approval, shielded scaffolds

may be used in wind velocities greater than 15 mph [24 km/h].)

5.4 On the scaffolding or on the horizontal areas, or both,

sufficient buckets, plastic ﬁlm, etc., shall be kept with the

applicator to counteract a problem without depositing any

foreign material on the substrate that could affect either initial

adhesion to the substrate or interlaminant adhesion of the foam.

5.5 All prepared areas shall be repaired the same day or

adequately covered to prevent the intrusion of moisture or

other foreign materials, or both. On vessels operating be-

low +70°F [21°C], repair them the same day without excep-

tion.

5.6 The spray-applied foam or rigid board shall be dry,

clean, and free of dust before application of the protective

coating. If the insulation has been left uncoated for more than

3 days, the surface shall be brushed and air blown before

applying the coating.

5.7 All surface preparation, accessory preparation, spray

foam application, and protective coating application shall be in

accordance with Practice C945.

6. Keywords

6.1 coating; outdoor service vessels; spray foam

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned

in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk

of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ﬁve years and

if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards

and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the

responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should

make your views known to the ASTM Committee on Standards, at the address shown below.

This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,

United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above

address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website

(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222

Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http://www.copyright.com/

C950/C950M − 08 (2023)

文档加载中……请稍候！
如果长时间未打开，您也可以点击刷新试试。

下载文档到电脑，查找使用更方便

亲，本站95%以上的标准规范都面向会员免费，办理VIP会员下载更省钱，平均每篇不到2元

立即下载 VIP免费下载

已全部加载

摘要：

ASTM C950 - C 950M - 08 (2023) 是一项由美国材料与试验协会（ASTM）发布的关于反射绝缘材料的标准规范，适用于评估用于建筑与工业领域反射隔热材料的性能、测试方法与安装要求。该标准覆盖了反射绝缘材料的热阻、反射率、耐久性及施工环境适应性等关键指标，旨在为工程设计、质量控制和合规认证提供统一的技术依据。2023年修订版进一步更新了环境测试条件、材料老化性能以及标准引用文件，以确保其与当前行业实践和国际规范的一致性。该标准主要适用于建筑围护结构热工设计、暖通空调系统节能优

展开>> 收起<<

ASTM C950 - C 950M - 08 (2023).pdf

共2页,预览2页

还剩页未读，继续阅读

声明：本文档系会员上传，若文档所含内容侵犯了您的版权或隐私，请立即通知，我们立即给予侵权申诉删除！

ASTM C950 - C 950M - 08 (2023)

相关推荐

开通VIP享超值会员特权

相关内容

热门标签

举报选择: