Steel reducers

Butt welding reducers are produced by pressing. The semi-finished product is rolled seamless tubes.

Reducers are mainly used as part of pipelines in the construction, energy engineering and mining industry.

Dimensions of welding reducers

OUTER DIAMETER (D)	26,9 – 114,3 mm (NPS 3/4 – 4)

WALL THICKNESS (T)	2,3 – 3,6 mm

Dimensions of delivered reducers are shown in dimensional table.

Buttwelding steel fittings – butt welding reducers

Dimensional	standard	SIZES (OD x WT)
EN	10253-1	26.9 x 2.3 – 114.3 x 3.60 mm [20 – 100 DN] [3/4 – 4 NPS]
ČSN	13 2200	26.9 x 2.3 – 114.3 x 3.60 mm [20 – 100 DN] [3/4 – 4 NPS]
ČSN	13 2385	26.9 x 2.3 – 114.3 x 3.60 mm [20 – 100 DN] [3/4 – 4 NPS]
DIN	2616-2	26.9 x 2.3 – 114.3 x 3.60 mm [20 – 100 DN] [3/4 – 4 NPS]

Steel for butt welding reducers

Reducers are made from carbon and low alloy steels.

Buttwelding steel fittings – butt welding reducers

Standard	TDC	Steel grade (open product)	Dimensional standard
ČSN	13 2370	11 353	13 2200
DIN	2609 (F,G)	St 35.8	2616-2
ČSN	13 2370	12 021	13 2385
STN	13 2370	11 353	13 2200
DIN	2609 (A)	St 37.0	2616-2
STN	13 2370	12 021	13 2385
EN	10256-1	S235	10253-1

Testing of welding reducers

The input tubes and ready made reducers are tested according to requirements and the appropriate standards.

Ends customization of the reducers

Upon agreement it is possible to supply reducers with a wall thickness of more than 3 mm with adjustment for a weld according to DIN 2559 standard

Packaging of welding reducers

Reducers are packaged:
(a) in cardboard boxes or
(b) metal pallets.

Marking of the welding reducers

Reducers are marked as required by standards or agreement.
Marking is done usually by stamping the agreed data.

Certificates for welding reducers

Certificates are issued according to either:

DIN 50 049 or
EN 10 204.

Dimensional tolerances of welding reducers

Dimensional tolerances are in accordance with relevant standards.

Heat treatment, condition of delivery and surface

The input tubes used for production of reducers are heat treated.

Reductions are delivered with the inner and outer surface descaled not preserved, without surface protection or with surface treated by blasting.

Cookie	Duration	Description
cky-consent	1 year	Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Necessary" category .
cookielawinfo-checkbox-advertisement	1 year	Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Advertisement" category .
cookielawinfo-checkbox-analytics	1 year	Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Analytics" category .
cookielawinfo-checkbox-functional	1 year	The cookie is set by the GDPR Cookie Consent plugin to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary	1 year	Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Necessary" category .
cookielawinfo-checkbox-others	1 year	Set by the GDPR Cookie Consent plugin, this cookie is used to store the user consent for cookies in the category "Others".
cookielawinfo-checkbox-performance	1 year	Set by the GDPR Cookie Consent plugin, this cookie is used to store the user consent for cookies in the category "Performance".

Cookie	Duration	Description
bcookie	2 years	LinkedIn sets this cookie from LinkedIn share buttons and ad tags to recognize browser ID.
bscookie	2 years	LinkedIn sets this cookie to store performed actions on the website.
lang	session	LinkedIn sets this cookie to remember a user's language setting.
li_gc	2 years	Used to store consent of guests regarding the use of cookies for non-essential purposes
lidc	1 day	LinkedIn sets the lidc cookie to facilitate data center selection.
UserMatchHistory	1 month	LinkedIn sets this cookie for LinkedIn Ads ID syncing.

Cookie	Duration	Description
_uetsid	1 day	Bing Ads sets this cookie to engage with a user that has previously visited the website.
_uetvid	1 year 24 days	Bing Ads sets this cookie to engage with a user that has previously visited the website.
SRM_B	1 year 24 days	Used by Microsoft Advertising as a unique ID for visitors.

Cookie	Duration	Description
_clck	1 year	To store a unique user ID. Collects data on the user’s navigation and behaviour on the website. This is used to compile statistical reports and heatmaps for the website owner.
_clsk	1 day	These cookies are set by Microsoft. They are used to calculate visitors, sessions, sources, and pages visited in an anonymous form for the Sites’ analytics reports.
_dc_gtm_UA-12090850-25	1 minute	This cookie is associated with sites using Google Tag Manager to load other scripts and code into a page. Where it is used it may be regarded as Strictly Necessary as without it, other scripts may not function correctly. The end of the name is a unique number which is also an identifier for an associated Google Analytics account.
_dc_gtm_UA-12090850-5	1 minute	This cookie is associated with sites using Google Tag Manager to load other scripts and code into a page. Where it is used it may be regarded as Strictly Necessary as without it, other scripts may not function correctly. The end of the name is a unique number which is also an identifier for an associated Google Analytics account.
_ga	2 years	The _ga cookie, installed by Google Analytics, calculates visitor, session and campaign data and also keeps track of site usage for the site's analytics report. The cookie stores information anonymously and assigns a randomly generated number to recognize unique visitors.
_ga_4EJEG00XN6	2 years	This cookie is installed by Google Analytics.
_gcl_au	3 months	Provided by Google Tag Manager to experiment advertisement efficiency of websites using their services.
_gid	1 day	Installed by Google Analytics, _gid cookie stores information on how visitors use a website, while also creating an analytics report of the website's performance. Some of the data that are collected include the number of visitors, their source, and the pages they visit anonymously.
_hjAbsoluteSessionInProgress	30 minutes	Hotjar sets this cookie to detect the first pageview session of a user. This is a True/False flag set by the cookie.
_hjFirstSeen	30 minutes	Hotjar sets this cookie to identify a new user’s first session. It stores a true/false value, indicating whether it was the first time Hotjar saw this user.
_hjIncludedInPageviewSample	2 minutes	Hotjar sets this cookie to know whether a user is included in the data sampling defined by the site's pageview limit.
_hjIncludedInSessionSample	2 minutes	Hotjar sets this cookie to know whether a user is included in the data sampling defined by the site's daily session limit.
_hjSession_104013	30 minutes	Collects statistics on the visitor's visits to the website, such as the number of visits, average time spent on the website and what pages have been read.
_hjSessionUser_104013	1 year	Used to store information about the time a sync with the lms_analytics cookie took place for users in the Designated Countries
_hjTLDTest	session	To determine the most generic cookie path that has to be used instead of the page hostname, Hotjar sets the _hjTLDTest cookie to store different URL substring alternatives until it fails.
AnalyticsSyncHistory	1 month	Used to store information about the time a sync with the lms_analytics cookie took place for users in the Designated Countries
CONSENT	2 years	YouTube sets this cookie via embedded youtube-videos and registers anonymous statistical data.

Cookie	Duration	Description
_fbp	3 months	This cookie is set by Facebook to display advertisements when either on Facebook or on a digital platform powered by Facebook advertising, after visiting the website.
ANONCHK	10 minutes	The ANONCHK cookie, set by Bing, is used to store a user's session ID and also verify the clicks from ads on the Bing search engine. The cookie helps in reporting and personalization as well.
ckf	1 year	It helps you see your targeted ad.
et_pub[2blSSM]	3 months	It helps you see your targeted ad.
et_pub[2blSSN]	3 months	It helps you see your targeted ad.
et_pub[2blSTr]	3 months	It helps you see your targeted ad.
euvf	14 days	It helps you see your targeted ad.
euvh	1 month	It helps you see your targeted ad.
fr	3 months	Facebook sets this cookie to show relevant advertisements to users by tracking user behaviour across the web, on sites that have Facebook pixel or Facebook social plugin.
MUID	1 year 24 days	Bing sets this cookie to recognize unique web browsers visiting Microsoft sites. This cookie is used for advertising, site analytics, and other operations.
SM	session	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
uuid2	3 months	The uuid2 cookie is set by AppNexus and records information that helps in differentiating between devices and browsers. This information is used to pick out ads delivered by the platform and assess the ad performance and its attribute payment.
VISITOR_INFO1_LIVE	5 months 27 days	A cookie set by YouTube to measure bandwidth that determines whether the user gets the new or old player interface.
YSC	session	YSC cookie is set by Youtube and is used to track the views of embedded videos on Youtube pages.
yt-remote-connected-devices	never	YouTube sets this cookie to store the video preferences of the user using embedded YouTube video.
yt-remote-device-id	never	YouTube sets this cookie to store the video preferences of the user using embedded YouTube video.
yt.innertube::nextId	never	This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen.
yt.innertube::requests	never	This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen.

Steel reducers

Dimensions of welding reducers

Buttwelding steel fittings – butt welding reducers

Steel for butt welding reducers

Buttwelding steel fittings – butt welding reducers

Testing of welding reducers

Ends customization of the reducers

Packaging of welding reducers

Marking of the welding reducers

Certificates for welding reducers

Dimensional tolerances of welding reducers

Heat treatment, condition of delivery and surface

Contact us