• 블로그
  • 소식
  • 고온 발전소 프로젝트를 위해 제작된 F91 RTJ 플랜지
Forged RTJ flange with machined ring groove
3 팔월 2026

고온 발전소 프로젝트를 위해 제작된 F91 RTJ 플랜지

프로젝트 뉴스Published: 3 팔월 2026SASA FLANGE Project Team
Project completed

ASTM A182 F91 ring type joint flanges were manufactured for a high-temperature power plant piping package. The order combined controlled material condition with RTJ groove inspection, PMI, ultrasonic examination, hardness testing and documented dimensional release.

Project snapshot

Project status Manufacturing and final inspection completed
재료 ASTM A182 F91 forged alloy steel
플랜지형 Weld neck RTJ
기준 ASME B16.5
압력 등급 수업 900
크기 범위 NPS 4–12; project-specific bores and weld ends
점검 PMI, 유타, 경도, RTJ groove and dimensional inspection
Application High-temperature power generation piping

Delivery highlights

RTJ groove geometry and surface condition were treated as critical sealing characteristics.
Hardness and heat-treatment records were reviewed alongside chemical identity.
Weld ends were matched to the project pipe wall and protected after inspection.

Why F91 required additional production control

F91 is a modified 9Cr-1Mo material whose high-temperature properties depend on the correct normalized-and-tempered condition. Chemistry alone cannot confirm that condition. The production route therefore preserved traceability to heat-treatment and mechanical-property records while preventing uncontrolled thermal exposure during later operations.

The flange hubs and weld ends were machined for the adjoining Grade 91 piping arrangement. Project welding and post-weld heat-treatment requirements remain part of the installed joint design and must be coordinated with the released flange condition.

RTJ groove and NDE verification

The ring groove was checked for profile, depth, pitch diameter, finish and freedom from damage. Ring number compatibility was verified from the approved project description. Ultrasonic testing addressed internal discontinuities in the forging, while visual and dimensional inspection covered accessible surfaces and geometry.

PMI, UT and hardness are complementary controls: PMI addresses alloy identity, UT addresses internal soundness and hardness supports verification of the delivered material condition.

Information needed for a comparable RFQ

A comparable inquiry should identify the exact material specification and grade, 관리 표준 및 에디션, NPS, 압력 등급, 플랜지형, 깃 달기, 보어 또는 일치하는 파이프 일정, quantity and destination. For this project-news scope, the key reference points were ASTM A182 F91 forged alloy steel, Weld neck RTJ, 수업 900 그리고 NPS 4–12; project-specific bores and weld ends.

State the required EN 10204 certificate type, 열수 추적성, PMI extent, 경도 한계, 치수 보고서, NDE method and acceptance standard, third-party witness points, packing method and required delivery date at quotation stage. Early definition allows manufacturing, inspection and document schedules to be reviewed together.

생산, inspection and packing photos

Images show the relevant SASA FLANGE production, quality-control and shipment stages used for this project-news report.

Long weld neck flange prepared for high-temperature piping
Forged hub geometry after controlled machining.
단조 배관 부품의 초음파 테스트
UT examination supporting internal-quality verification.
Protected forged components in export packaging
Finished components packed for international transport.
ASTM A182 F91 Flanges for High-Temperature Piping Systems P91 파이프를 F91 플랜지와 일치시키는 방법 단조 합금강 플랜지의 NDT 검사 방법

자주 묻는 질문

Can PMI prove that an F91 flange received the correct heat treatment?

아니요. PMI checks alloy chemistry. Heat-treatment records, mechanical properties and hardness provide evidence about material condition.

Why use an RTJ facing in high-pressure power piping?

RTJ joints use a metallic ring and machined groove for demanding pressure and temperature service when specified by the piping design.

Was the F91 flange selected independently of the pipe?

아니요. 등급, 구경, weld end, filler metal and field heat-treatment planning must be reviewed as one piping system.

Request a quotation for alloy steel flanges

Send the ASTM grade, 스탠다드와 에디션, NPS, 압력 등급, 플랜지형, 깃 달기, 보어 또는 파이프 일정, 수량, delivery destination and required PMI, 임사체험, 경도, third-party inspection and documentation.

견적 요청 보내기플랜지 제품 보기

관련 게시물

집제품
찾다