Details to include in your quote request

Item specifications	Applicable standard, dimensions, pressure rating, material and quantity
Attachments	Drawings, product photos, item list or request for quotation
General requirements	Preferred delivery date, inspection and test report requirements

TECHNICAL RESOURCES

Long welding neck flange (LWN) dimensions

View the ASME B16.5 LWN section of the TAEWON FLANGE catalog, with long welding neck flange drawings and dimensions for Classes 150 through 2500.

Both pages zoom together. Drag or swipe left or right to move across the drawing.

Save dimension sheet

CLASS 150 FLANGES

CLASS 150 FLANGES · Download dimension sheet

Long welding neck (LWN) · Class 150 catalogue dimensions · Dimensions in mm
NPS	Outside diameter D	Bore B	Thickness t	Length through hub L	Bolt circle C	Bolt holes (qty)	Hole diameter H
1/2	90	15.8	9.6	229	60.3	4	15.9
3/4	100	20.9	11.2	229	69.9	4	15.9
1	110	26.6	12.7	229	79.4	4	15.9
1 1/4	115	35.1	14.3	229	88.9	4	15.9
1 1/2	125	40.9	15.9	229	98.4	4	15.9
2	150	52.5	17.5	229	120.7	4	19.1
2 1/2	180	62.7	20.7	229	139.7	4	19.1
3	190	77.9	22.3	229	152.4	4	19.1
3 1/2	215	90.1	22.3	229	177.8	8	19.1
4	230	102.3	22.3	229	190.5	8	19.1
5	255	128.2	22.3	305	215.9	8	22.2
6	280	154.1	23.9	305	241.3	8	22.2
8	345	202.7	27	305	298.5	8	22.2
10	405	254.6	28.6	305	362	12	25.4
12	485	304.8	30.2	305	431.8	12	25.4
14	535	By purchaser	33.4	305	476.3	12	28.6
16	595	By purchaser	35	305	539.8	16	28.6
18	635	By purchaser	38.1	305	577.9	16	31.8
20	700	By purchaser	41.3	305	635	20	31.8
24	815	By purchaser	46.1	305	749.3	20	34.9

TAEWON FLANGE online catalogue · ASME B16.5 LWN, Class 150, sheet 1. B and L are the bore and length on the TAEWON drawing.

Check the standard and edition shown in the document. Tell us the nominal size, pressure rating, material and quantity so we can confirm the applicable specifications and availability.

QUALITY POLICY

Quality policy

Three principles guide how we manufacture and supply flanges.

Customer requirements

We review customer requirements for each product and use feedback to improve work on the shop floor.

Continuous quality improvement

We use problems identified during production to improve our working methods and quality management system.

Compliance with standards

We base our quality checks on the applicable product standards and the drawings specified by the customer.

Quality and product certifications

ISO 9001 quality management system · KS B 1506 flange product certification · KC hygiene and safety standards

View certificates →

Request a quote

MULTI-ITEM QUOTATION

Request a quote
for multiple items at once.

Enter one item per row.
Choose a suggestion or type your own specification. Press Tab to move to the next field.

Prefer to speak with us?051-941-8970TAEWON FLANGE

Review your details before sending your quotation request.

01 · CONTACT

Who is requesting the quote?

Enter your company name and the email address where you would like to receive the quote.

Company name Required

Email for quote Required

Contact person Optional

02 · ITEMS

Items to quote 0 items

Notes appear for specifications that may need a check. You can still include those items in your request.
Tab moves to the next field. After entering a quantity, press Enter to add another item with the same specifications.

03 · FILES & REQUESTS

Drawings and general requirements

If you have a drawing or item list, you can skip the specifications above. You can attach several files.

Optional

Choose drawings, photos, Excel or CAD files

최대 10개 · 첨부파일 합계 7 MB 이내

Preferred delivery date

Other requirements

Enter an item or attach a file.

Review your items and attachments together.

REVIEW YOUR REQUEST

Review your quote request

We can clarify any missing specifications with you later.

No.	Standard	Pressure rating	Flange type	Facing	Size	SCH	Material	Origin	Quantity	Notes / requests

엑셀 파일을 내려받아 회사 이메일로 직접 보낼 수도 있습니다.

Industrial connections start with a flange.

Flange manufacturer and distributor TAEWON FLANGE

Products

Flange dimension tables

Request a quote for multiple items at once.

Products

Details to include in your quote request

Long welding neck flange (LWN) dimensions

CLASS 150 FLANGES

CLASS 300 FLANGES

CLASS 400 FLANGES

CLASS 600 FLANGES

CLASS 900 FLANGES

CLASS 1500 FLANGES

CLASS 2500 FLANGES

Nominal wall thickness (SCH)

We manufacture and supply flanges for industrial facilities.

Welcome to TAEWON FLANGE.

Company profile

Our history

TAEWON FLANGE founded

First forged flange deliveries

Expanded customer base

Incorporation

Added machining equipment

Research and development center

Obtained KS B 1506 certification

Obtained KC certification

Registered as a vendor with BASF Company Ltd. (Korea)

Certificates

KS B 1506

ISO 9001

KC

Factory photos & videos

Machining videos

Finished products

Machining equipment 6 machines

01 DOOSAN VC 510

02 DOOSAN VC 510

03 PUMA GT2100B

04 DOOSAN PUMA V400

05 DOOSAN PUMA V400

06 DOOSAN PUMA TW 2600

Directions

TAEWON FLANGE Co., Ltd.

Please call before visiting.

Quality policy

Customer requirements

Continuous quality improvement

Compliance with standards

Quality and product certifications

Request a quote for multiple items at once.

Who is requesting the quote?

Items to quote 0 items

Drawings and general requirements

Review your quote request

Industrial connections
start with a flange.

Flange manufacturer and distributor
TAEWON FLANGE

Request a quote
for multiple items at once.

We manufacture and supply
flanges for industrial facilities.

Request a quote
for multiple items at once.